Gantry 4 with Joomla 3.9 problem

[Goofer1975]

After an update to Joomla 3.9 following error occured:

Warning: require_once(/customers/9/a/8/delinnenwinkel.net/httpd.www/libraries/joomla/document/html/renderer/head.php): failed to open stream: No such file or directory in /customers/9/a/8/delinnenwinkel.net/httpd.www/templates/gantry/error.php on line 85 Fatal error: require_once(): Failed opening required '/customers/9/a/8/delinnenwinkel.net/httpd.www/libraries/joomla/document/html/renderer/head.php' (include_path='.:/usr/share/php') in /customers/9/a/8/delinnenwinkel.net/httpd.www/templates/gantry/error.php on line 85

Tried some suggested fixes like https://rockettheme.com/forum/gantry-fo ... rror-pages but then following error message disapears in the front-end:

0 - [] operator not supported for strings. Anybody any idea?

[KianWilliam]

You might be needing to update your template to its last version, go to their site and check if you are using template's last version.
Kian William

[Goofer1975]

Gantry v4.1.137 is used, the last version it seems.

[toivo]

The latest version of Gantry 4 template is not compatible with Joomla 3.8 or 3.9 because the file that reports errors, error.php in the above message, tries to load the file libraries/joomla/document/html/renderer/head.php, which last existed in Joomla 3.7.5 but has since been removed.

The suggested fix at https://rockettheme.com/forum/gantry-fo ... rror-pages is now included in the Gantry 4 template version 4.1.37 but it does not work because of the same reason.

Use the debug option (Global Configuration - System and configure the Debug plugin) to get more information and possibly find out what causes the error that Gantry 4 is trying to report. Otherwise it is best to test Gantry 5 or start looking for different template altogether.

[toivo]

0 - [] operator not supported for strings

This error is known to occur in some third party extensions that are not compatible with PHP 7. Search for "joomla 0 - [] operator not supported for strings" in your favourite search engine and you will get a number of hits from different plugins and templates.

Check the third party extensions from you site and enable/disable them one at a time to find the culprit.

If that does not help, please post the results from the Forum Post Assistant (FPA) by following the instructions from viewtopic.php?f=714&t=793531.