invisible in edit mode of joomla frontend editor Topic is solved

[taksejimo]

Frontend editor doesn't display contents in edit mode on Joomla while visible in reference mode.
I changed the editor from JCE to Tiny MCE or code mirror. The results are same as invisible.
I examined the screen via developer tool and found html contents exists.
Please teach me solution or any advice.

JCE pro 2.9.29
Joomla 3.10.11
template t4 blank template

Thanks and Regards, T.Sejimo.

[leolam]

https://forumpostassistant.github.io/docs/

Leo

[taksejimo]

invisible page contents in edit mode of front end editor

none

2 september, 2022

no action

Joomla! Instance :: Joomla! 3.10.11-Stable (Daraja) 14-August-2022
Joomla! Platform :: Joomla Platform 13.1.0-Stable (Curiosity) 24-Apr-2013
Joomla! Configured :: Yes | Read-Only (444) |
Configuration Options :: Offline: false | SEF: true | SEF Suffix: true | SEF ReWrite: true | .htaccess/web.config: Yes | GZip: false | Cache: false | CacheTime: 60 | CacheHandler: file | CachePlatformPrefix: false | FTP Layer: false | Proxy: false | LiveSite: | Session lifetime: 300 | Session handler: none | Shared sessions: false | SSL: 2 | Error Reporting: none | Site Debug: false | Language Debug: false | Default Access: Public | Unicode Slugs: false | dbConnection Type: mysqli | PHP Supports J! 3.10.11: Yes | Database Supports J! 3.10.11: Yes | Database Credentials Present: Yes |

Host Configuration :: OS: FreeBSD | OS Version: 11.2-RELEASE-p15 | Technology: amd64 | Web Server: Apache | Encoding: gzip, deflate, br | System TMP Writable: Yes | Free Disk Space : 1538.10 GiB |

PHP Configuration :: Version: 8.0.21 | PHP API: apache2handler | Session Path Writable: No | Display Errors: 0 | Error Reporting: 4177 | Log Errors To: | Last Known Error: | Register Globals: | Magic Quotes: | Safe Mode: | Allow url fopen: 1 | Open Base: | Uploads: 1 | Max. Upload Size: 52M | Max. POST Size: 10M | Max. Input Time: 60 | Max. Execution Time: 30 | Memory Limit: 128M

Database Configuration :: Version: 5.7.32-log (Client:mysqlnd 8.0.21) | Database Size: 748.22 MiB | #of Tables with config prefix:  133 | #of other Tables:  0 | User Privileges : GRANT ALL

PHP Extensions :: Core (8.0.21) | date (8.0.21) | libxml (8.0.21) | openssl (8.0.21) | pcre (8.0.21) | sqlite3 (8.0.21) | zlib (8.0.21) | bcmath (8.0.21) | ctype (8.0.21) | curl (8.0.21) | dom (20031129) | hash (8.0.21) | fileinfo (8.0.21) | filter (8.0.21) | ftp (8.0.21) | gd (8.0.21) | gettext (8.0.21) | gmp (8.0.21) | SPL (8.0.21) | iconv (8.0.21) | intl (8.0.21) | json (8.0.21) | mbstring (8.0.21) | session (8.0.21) | standard (8.0.21) | mysqlnd (mysqlnd 8.0.21) | PDO (8.0.21) | pdo_mysql (8.0.21) | pdo_sqlite (8.0.21) | Phar (8.0.21) | posix (8.0.21) | Reflection (8.0.21) | mysqli (8.0.21) | SimpleXML (8.0.21) | snmp (8.0.21) | soap (8.0.21) | exif (8.0.21) | tokenizer (8.0.21) | xml (8.0.21) | xmlreader (8.0.21) | xmlwriter (8.0.21) | xsl (8.0.21) | zip (1.19.5) | apache2handler (8.0.21) | apcu (5.1.20) | imagick (3.5.0) | mcrypt (1.0.4) | Zend OPcache (8.0.21) | Zend Engine (4.0.21) |
Potential Missing Extensions ::

Switch User Environment :: PHP CGI: No | Server SU: No | PHP SU: No | Potential Ownership Issues: No

Apache Modules :: core | mod_so | http_core | prefork | mod_unixd | mod_access_compat | mod_autoindex | mod_alias | mod_mime | mod_negotiation | mod_ssl | mod_socache_shmcb | mod_suexec | mod_setenvif | mod_rewrite | mod_proxy | mod_auth_basic | mod_authn_file | mod_authn_core | mod_authnz_ldap | mod_authz_core | mod_authz_host | mod_authz_groupfile | mod_authz_user | mod_actions | mod_cgi | mod_deflate | mod_filter | mod_dir | mod_env | mod_expires | mod_headers | mod_include | mod_proxy_http | mod_status | mod_userdir | mod_log_config | util_ldap | mod_dav | mod_dav_fs | mod_access_limit | mod_remotehost_fix | mod_sakura_vd | mod_transfer_limit | mod_php | Apache |
Potential Missing Modules ::

Core Folders :: images/ (755) | components/ (755) | modules/ (755) | plugins/ (755) | language/ (755) | templates/ (755) | cache/ (755) | logs/ (755) | tmp/ (755) | administrator/components/ (755) | administrator/modules/ (755) | administrator/language/ (755) | administrator/templates/ (755) | administrator/logs/ (755) |

Elevated Permissions (First 10) ::

Database statistics :: Uptime: 54700929 | Threads: 14 | Questions: 72322861514 | Slow queries: 22376 | Opens: 3565661899 | Flush tables: 143 | Open tables: 9600 | Queries per second avg: 1322.150 |

Components :: Site ::
Core :: com_mailto (3.0.0) 1 | com_wrapper (3.0.0) 1 |
3rd Party:: WF_LINKS_JOOMLALINKS_TITLE (2.9.29) ? | WF_FILESYSTEM_JOOMLA_TITLE (2.9.29) ? | WF_LINK_SEARCH_TITLE (2.9.29) ? | WF_AGGREGATOR_VIDEO_TITLE (2.9.29) ? | WF_AGGREGATOR_DAILYMOTION_TITLE (2.9.29) ? | WF_AGGREGATOR_AUDIO_TITLE (2.9.29) ? | WF_AGGREGATOR_[youtube]_TITLE (2.9.29) ? | WF_AGGREGATOR_VIMEO_TITLE (2.9.29) ? | WF_POPUPS_JCEMEDIABOX_TITLE (2.9.29) ? | WF_XHTMLXTRAS_TITLE (2.9.29) ? | WF_FULLSCREEN_TITLE (2.9.29) ? | WF_AUTOSAVE_TITLE (2.9.29) ? | WF_VISUALCHARS_TITLE (2.9.29) ? | JCE - Noneditable (1.0.0) ? | WF_TEMPLATEMANAGER_TITLE (2.9.29) ? | WF_KITCHENSINK_TITLE (2.9.29) ? | WF_BROWSER_TITLE (2.9.29) ? | WF_SPELLCHECKER_TITLE (2.9.29) ? | WF_EMOTIONS_TITLE (2.9.29) ? | WF_STYLESELECT_TITLE (2.9.29) ? | WF_PREVIEW_TITLE (2.9.29) ? | WF_MEDIAMANAGER_TITLE (2.9.29) ? | WF_MEDIA_TITLE (2.9.29) ? | WF_HR_TITLE (2.9.29) ? | WF_IMGMANAGER_EXT_TITLE (2.9.29) ? | WF_WORDCOUNT_TITLE (2.9.29) ? | WF_PRINT_TITLE (2.9.29) ? | WF_HELP_TITLE (2.9.29) ? | WF_ARTICLE_TITLE (2.9.29) ? | WF_FONTSELECT_TITLE (2.9.29) ? | WF_FORMATSELECT_TITLE (2.9.29) ? | WF_TEXTCASE_TITLE (2.9.29) ? | WF_STYLE_TITLE (2.9.29) ? | WF_ANCHOR_TITLE (2.9.29) ? | WF_FONTSIZESELECT_TITLE (2.9.29) ? | WF_CLIPBOARD_TITLE (2.9.29) ? | WF_VISUALBLOCKS_TITLE (2.9.29) ? | WF_NONBREAKING_TITLE (2.9.29) ? | WF_REFERENCE_TITLE (2.9.11) ? | WF_TABLE_TITLE (2.9.29) ? | WF_LAYER_TITLE (2.7.20) ? | JCE - Columns (1.0.0) ? | WF_SEARCHREPLACE_TITLE (2.9.29) ? | WF_CAPTION_TITLE (2.9.29) ? | WF_TEXTPATTERN_TITLE (2.9.29) ? | WF_DIRECTIONALITY_TITLE (2.9.29) ? | WF_MICRODATA_TITLE (2.9.29) ? | WF_FONTCOLOR_TITLE (2.9.29) ? | WF_ATTRIBUTES_TITLE (2.9.11) ? | WF_LISTS_TITLE (2.9.29) ? | WF_SOURCE_TITLE (2.9.29) ? | WF_LINK_TITLE (2.9.29) ? | WF_IFRAME_TITLE (2.9.29) ? | WF_IMGMANAGER_TITLE (2.9.29) ? | WF_CLEANUP_TITLE (2.9.29) ? | WF_CHARMAP_TITLE (2.9.29) ? | WF_FILEMANAGER_TITLE (2.9.29) ? | WF_CONTEXTMENU_TITLE (2.9.29) ? |

Components :: Admin ::
Core :: com_weblinks (3.4.1) 1 | com_categories (3.0.0) 1 | com_fields (3.7.0) 1 | com_users (3.0.0) 1 | com_messages (3.0.0) 1 | com_cpanel (3.0.0) 1 | com_search (3.0.0) 1 | com_plugins (3.0.0) 1 | com_templates (3.0.0) 1 | com_banners (3.0.0) 1 | com_privacy (3.9.0) 1 | com_finder (3.0.0) 1 | com_ajax (3.2.0) 1 | com_newsfeeds (3.0.0) 1 | com_config (3.0.0) 1 | com_joomlaupdate (3.10.1) 1 | com_cache (3.0.0) 1 | com_checkin (3.0.0) 1 | com_redirect (3.0.0) 1 | com_tags (3.1.0) 1 | com_postinstall (3.2.0) 1 | com_media (3.0.0) 1 | com_login (3.0.0) 1 | com_admin (3.0.0) 1 | com_languages (3.0.0) 1 | com_content (3.0.0) 1 | com_actionlogs (3.9.0) 1 | com_associations (3.7.0) 1 | com_installer (3.0.0) 1 | com_menus (3.0.0) 1 | com_contenthistory (3.2.0) 1 | com_modules (3.0.0) 1 |
3rd Party:: ACCORDEONMENUCK (3.2.2) 1 | Accordeon Menu CK - Virtuemart (3.2.0) 1 | Accordeon Menu CK - K2 (3.2.0) 1 | Accordeon Menu CK - Joomshopping (3.2.0) 1 | Accordeon Menu CK - Hikashop (3.2.0) 1 | Accordeon Menu CK - Categories (3.2.1) 1 | Accordeon Menu CK - Articles by dat (3.2.1) ? | Accordeon Menu CK - Adsmanager (3.2.0) 1 | Accordeon Menu CK (3.2.0) 1 | System - Accordeon Menu CK (3.2.0) 1 | COM_MIJOSQL (1.1.1) 1 | COM_REGULARLABSMANAGER (8.1.3) 1 | Securitycheck Pro Control Center (1.1.8) 0 | COM_VERTEXUPDATE (1.0.0) 1 | Securitycheck Pro (3.5.0) 1 | com_jem (2.3.3) 1 | COM_JCE (2.9.29) 1 | COM_CONTENTTEMPLATER (10.2.0PRO) 1 | Akeeba (8.1.10) 1 | com_chronoforms5 (5.0.17) 1 | com_maximenuck (9.1.26) 1 | Maximenu CK (9.1.26) 1 | System - Maximenu CK (9.1.21) 1 | Maximenu CK - Virtuemart (9.1.21) 1 | Maximenu CK - Hikashop (9.1.25) 1 | Maximenu CK - Articles by date (9.1.25) 1 | Maximenu CK - Joomshopping (9.1.21) 1 | Maximenu CK - K2 (9.1.21) 1 | Maximenu CK - Adsmanager (9.1.21) 1 | Maximenu CK - Categories (9.1.25) 1 | COM_OSMAP (5.0.2) 1 | blockoverseas (0.0.4) 1 | PWT ACL (4.1.0) 1 |

Modules :: Site ::
Core :: mod_articles_latest (3.0.0) 1 | mod_related_items (3.0.0) 1 | mod_users_latest (3.0.0) 1 | mod_search (3.0.0) 1 | mod_custom (3.0.0) 1 | mod_menu (3.0.0) 1 | mod_wrapper (3.0.0) 1 | mod_finder (3.0.0) 1 | mod_tags_similar (3.1.0) 1 | mod_whosonline (3.0.0) 1 | mod_login (3.0.0) 1 | mod_tags_popular (3.1.0) 1 | mod_articles_news (3.0.0) 1 | mod_articles_archive (3.0.0) 1 | mod_stats (3.0.0) 1 | mod_banners (3.0.0) 1 | mod_feed (3.0.0) 1 | mod_articles_category (3.0.0) 1 | mod_breadcrumbs (3.0.0) 1 | mod_languages (3.5.0) 1 | mod_random_image (3.0.0) 1 | mod_footer (3.0.0) 1 | mod_syndicate (3.0.0) 1 | mod_articles_popular (3.0.0) 1 | mod_articles_categories (3.0.0) 1 |
3rd Party:: Accordeon Menu CK (3.2.0) 1 | mod_customcode (1.0.6) 1 | mod_jem_jubilee (2.3.0) 1 | Flexi Custom Code (2.1) 1 | mod_jem_banner (2.3.0) 1 | mod_showplus (1.0.5.7) 1 | Maximenu CK (9.1.26) 1 | ChronoForms5 (V5 RC1.2) 1 | Vertical Content Accordion (2.0.0) 1 | MOD_FANCYPANTSACCORDION (3.0) 1 | mod_jem (2.3.0) 1 | mod_jem_cal (2.3.0) 1 | mod_jem_wide (2.3.0) 1 | mod_jem_teaser (2.3.0) 1 |

Modules :: Admin ::
Core :: mod_feed (3.0.0) 1 | mod_latest (3.0.0) 1 | mod_sampledata (3.8.0) 1 | mod_quickicon (3.0.0) 1 | mod_logged (3.0.0) 1 | mod_status (3.0.0) 1 | mod_version (3.0.0) 1 | mod_latestactions (3.9.0) 1 | mod_privacy_dashboard (3.9.0) 1 | mod_custom (3.0.0) 1 | mod_stats_admin (3.0.0) 1 | mod_popular (3.0.0) 1 | mod_submenu (3.0.0) 1 | mod_login (3.0.0) 1 | mod_multilangstatus (3.0.0) 1 | mod_toolbar (3.0.0) 1 | mod_menu (3.0.0) 1 | mod_title (3.0.0) 1 |
3rd Party:: Securitycheck Pro Info Module (3.5.0) 1 | MOD_CACHECLEANER (8.1.2) 1 |

Libraries ::
Core ::
3rd Party:: Regular Labs Library (22.8.15401) 1 | file_fof30 (3.6.2) ? | file_fof40 (4.1.3) ? |

Plugins ::
Core :: plg_privacy_message (3.9.0) 1 | plg_privacy_user (3.9.0) 1 | plg_privacy_content (3.9.0) 1 | plg_privacy_consents (3.9.0) 1 | plg_privacy_actionlogs (3.9.0) 1 | PLG_ACTIONLOG_JOOMLA (3.9.0) 1 | plg_captcha_recaptcha (3.4.0) 0 | plg_captcha_recaptcha_invisible (3.8) 0 | plg_content_pagebreak (3.0.0) 1 | plg_content_finder (3.0.0) 0 | plg_content_loadmodule (3.0.0) 1 | plg_content_joomla (3.0.0) 1 | plg_content_fields (3.7.0) 1 | plg_content_pagenavigation (3.0.0) 1 | plg_content_vote (3.0.0) 1 | plg_content_confirmconsent (3.9.0) 0 | plg_content_emailcloak (3.0.0) 1 | plg_extension_joomla (3.0.0) 1 | plg_finder_content (3.0.0) 1 | plg_finder_contacts (3.0.0) 1 | plg_finder_tags (3.0.0) 1 | plg_finder_categories (3.0.0) 1 | plg_finder_newsfeeds (3.0.0) 1 | plg_user_contactcreator (3.0.0) 0 | plg_user_joomla (3.0.0) 1 | plg_user_profile (3.0.0) 0 | plg_user_terms (3.9.0) 0 | plg_authentication_gmail (3.0.0) 0 | plg_authentication_ldap (3.0.0) 0 | plg_authentication_cookie (3.0.0) 1 | plg_authentication_joomla (3.0.0) 1 | PLG_INSTALLER_URLINSTALLER (3.6.0) 1 | plg_installer_packageinstaller (3.6.0) 1 | PLG_INSTALLER_FOLDERINSTALLER (3.6.0) 1 | plg_installer_webinstaller (2.1.2) 1 | PLG_SYSTEM_ACTIONLOGS (3.9.0) 1 | plg_system_stats (3.5.0) 1 | plg_system_sef (3.0.0) 1 | plg_system_log (3.0.0) 1 | plg_system_fields (3.7.0) 1 | plg_system_languagecode (3.0.0) 0 | plg_system_privacyconsent (3.9.0) 1 | plg_system_sessiongc (3.8.6) 1 | plg_system_remember (3.0.0) 1 | plg_system_languagefilter (3.0.0) 0 | plg_system_p3p (3.0.0) 1 | plg_system_logout (3.0.0) 1 | plg_system_debug (3.0.0) 1 | plg_system_updatenotification (3.5.0) 1 | plg_system_cache (3.0.0) 0 | plg_system_redirect (3.0.0) 1 | plg_system_highlight (3.0.0) 1 | plg_system_logrotation (3.9.0) 1 | plg_editors-xtd_fields (3.7.0) 1 | plg_editors-xtd_menu (3.7.0) 1 | plg_editors-xtd_pagebreak (3.0.0) 1 | plg_editors-xtd_module (3.5.0) 0 | plg_editors-xtd_readmore (3.0.0) 1 | plg_editors-xtd_image (3.0.0) 1 | plg_editors-xtd_article (3.0.0) 1 | plg_quickicon_extensionupdate (3.0.0) 1 | plg_quickicon_joomlaupdate (3.0.0) 1 | plg_quickicon_phpversioncheck (3.7.0) 1 | plg_quickicon_privacycheck (3.9.0) 1 | plg_quickicon_eos310 (3.10.0) 1 | plg_fields_editor (3.7.0) 1 | plg_fields_calendar (3.7.0) 1 | plg_fields_sql (3.7.0) 1 | plg_fields_user (3.7.0) 1 | plg_fields_textarea (3.7.0) 1 | plg_fields_radio (3.7.0) 1 | plg_fields_integer (3.7.0) 1 | plg_fields_color (3.7.0) 1 | plg_fields_url (3.7.0) 1 | plg_fields_text (3.7.0) 1 | plg_fields_repeatable (3.9.0) 1 | plg_fields_list (3.7.0) 1 | plg_fields_media (3.7.0) 1 | plg_fields_imagelist (3.7.0) 1 | plg_fields_usergrouplist (3.7.0) 1 | plg_fields_checkboxes (3.7.0) 1 | plg_twofactorauth_yubikey (3.2.0) 0 | plg_twofactorauth_totp (3.2.0) 0 | plg_search_tags (3.0.0) 1 | plg_search_contacts (3.0.0) 1 | plg_search_newsfeeds (3.0.0) 1 | plg_search_categories (3.0.0) 1 | plg_search_content (3.0.0) 1 |
3rd Party:: Accordeon Menu CK - Virtuemart (3.2.0) 1 | Accordeon Menu CK - K2 (3.2.0) 1 | Accordeon Menu CK - Joomshopping (3.2.0) 1 | Accordeon Menu CK - Hikashop (3.2.0) 1 | Accordeon Menu CK - Categories (3.2.1) 1 | Accordeon Menu CK - Articles by dat (3.2.1) ? | Accordeon Menu CK - Adsmanager (3.2.0) 1 | plg_editors_jce (2.9.29) 1 | plg_editors_tinymce (4.5.12) 1 | plg_editors_codemirror (5.60.0) 1 | Maximenu CK - Articles by date (9.1.25) 1 | Maximenu CK - Virtuemart (9.1.21) 1 | Maximenu CK - Joomshopping (9.1.21) 1 | Maximenu CK - K2 (9.1.21) 1 | Maximenu CK - Adsmanager (9.1.21) 1 | Maximenu CK - Hikashop (9.1.25) 1 | Maximenu CK - Categories (9.1.25) 1 | PLG_ACTIONLOG_CONTENTTEMPLATER (10.2.0PRO) 1 | PLG_ACTIONLOG_REGULARLABSMANAGER (8.1.3) 1 | PLG_ACTIONLOG_AKEEBABACKUP (8.1.10) 0 | plg_jem_mailer (2.3.0) 1 | plg_jem_comments (2.3.0) 1 | plg_content_jemlistevents (2.3.0) 1 | plg_content_jce (2.9.29) 1 | Chronoforms5 (V5.0) 1 | PLG_CONTENT_ITPSHARE (2.10) 1 | plg_content_jem (2.3.0) 1 | plg_extension_jce (2.9.29) 1 | plg_finder_jem (2.3.0) 1 | plg_installer_jce (2.9.29) 1 | PLG_INSTALLER_AKEEBABACKUP (8.1.10) 1 | plg_system_osmylicensesmanager (2.0.15) 1 | System - Accordeon Menu CK (3.2.0) 1 | System - S5 Flex Menu (1.0) 1 | System - Securitycheck Pro (3.5.0) 1 | System - Securitycheck (2.8.4) 1 | System - Maximenu CK (9.1.21) 1 | PLG_SYSTEM_REGULARLABS (22.8.15401) 1 | PLG_SYSTEM_BACKUPONUPDATE (8.1.10) 1 | plg_system_jcemediabox (2.1.2) 1 | System - Securitycheck Pro Cron (3.5.0) 1 | PLG_SYSTEM_SOURCERER (9.2.3) 1 | PLG_SYSTEM_MODULESANYWHERE (7.15.2) 1 | System - Securitycheck Spam Protect (1.0.6) ? | plg_system_jce (2.9.29) 1 | T3 Framework (3.1.0) 1 | plg_system_sl_scrolltotop (2.0.0) 0 | PLG_SYSTEM_CACHECLEANER (8.1.2) 1 | System - url Inspector (3.5.0) 1 | System - Securitycheck Pro Update D (1.0.4) ? | PLG_SYSTEM_CONTENTTEMPLATER (10.2.0PRO) 1 | System - Track Actions (1.0.10) 1 | PLG_SYSTEM_TABS (8.2.4) 1 | System - Track Actions K2 (1.0.10) 1 | System - Track Actions Akeeba Backu (1.0.10) ? | System - Track Actions Acymailing (1.0.10) 1 | plg_system_t4 (2.2.1) 1 | System - PWT ACL (4.1.0) 1 | PLG_EDITORS-XTD_TABS (8.2.4) 1 | PLG_EDITORS-XTD_MODULESANYWHERE (7.15.2) 1 | PLG_EDITORS-XTD_SOURCERER (9.2.3) 1 | PLG_EDITORS-XTD_CONTENTTEMPLATER (10.2.0PRO) 1 | plg_quickicon_akeebabackup (8.1.10) 1 | plg_quickicon_jce (2.9.29) 1 | plg_fields_mediajce (2.9.29) 1 | plg_search_jem (2.3.0) 1 | PLG_OSMAP_JOOMLA (5.0.2) 1 |

Templates :: Site :: newsplace (1.0) 1 | enopo_three_res_20140428_3 (1.0) 1 | newsplace (1.0) 1 | beez3 (3.1.0) 1 | enopo_three_fix_20140428 (1.0) 1 | protostar (1.0) 1 | t3_bs3_blank (2.2.3) 1 | t4_blank (1.1.4) 1 |
Templates :: Admin :: isis (1.0) 1 | hathor (3.0.0) 1 |

[taksejimo]

I found that page is not invisible but it takes very long time to be displayed. I am not sure why so long.
Then problem is what is the cause of take long time to display page in front end editor.

[Per Yngve Berg]

Max. Upload Size: 52M | Max. POST Size: 10M

Post must be larger than upload.

Session Path Writable: No |

Must be Yes. Contact your host.

[taksejimo]

I changed the value according to the recommendation as below.
upload_max_filesize = 16M
post_max_size = 20M
session.save_path = "/tmp"
The edit operation is still very slow.

The problem happens in the case of setting below after <head>
<link rel="stylesheet" href="templates/t4_blank/bootstrap/css/bootstrap-responsive.min.css">
<link rel="stylesheet" href="templates/t4_blank/bootstrap/css/bootstrap.min.css">

However the edit operation is faster and #publishing tab works if <link rel="stylesheet" href="templates/t4_blank/bootstrap/css/bootstrap.min.css"> is deleted.

Does it mean any confliction between bootstrap.min.css and Joomla happen?
Or what else may cause the problem?
Please give me any advice or suggestion.

Thanks and Regards,

[AMurray]

post and upload limit sizes should be bigger more in the ball-park of 64M (upload_max_size limit) 128M (post_max_size limit)

Those sizes you set are likely to lead to further problems.

[taksejimo]

It is found that menu program has the problem. Close this topics.
Thank you for to help me up to this point. Best Regards, T.Sejimo

[glen_sflm]

Menu program? How is that? I am trying to resolve this as well.