enable system-koowa plugin causes blank admin screen

[ccdbbao7]

I have not used the backend admin screen since 2020. Yesterday, I tried to log in to Joomla admin, it did not give any error, but the screen did load. It is just a blank. There are suggestions that I should disable some plugins at _extensions table. I did set one plugin row to 0 (disable) on a line that says System - Koowa. It lets me log in and see the Joomla Admin screen as a super user. But try to load the control panel under the System menu, it gives this message: Call to a member function format() on null. I can use anything from the dropdown menu, except under the System/Control Panel.

There are suggestions that I change configuration.php on a line to public $error_reporting = 'maximum'; And if I enable the System - Koowa at the _extensions table and try to login in to the Admin screen again, I get all these errors and warning:

Code: Select all

Warning: Declaration of KHttpUrl::set($url) should be compatible with KObject::set($property, $value = NULL) in /hermes/bosnacweb04/bosnacweb04aw/b2164/ipw.cambodiancommunityday/public_html/libraries/koowa/http/url.php on line 455

Warning: Declaration of KHttpUrl::get($parts = self::FULL) should be compatible with KObject::get($property = NULL, $default = NULL) in /hermes/bosnacweb04/bosnacweb04aw/b2164/ipw.cambodiancommunityday/public_html/libraries/koowa/http/url.php on line 455

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; JAT3_AdminUtil has a deprecated constructor in /hermes/bosnacweb04/bosnacweb04aw/b2164/ipw.cambodiancommunityday/public_html/plugins/system/jat3/jat3/core/admin/util.php on line 21

Warning: session_regenerate_id(): Cannot regenerate session id - headers already sent in /hermes/bosnacweb04/bosnacweb04aw/b2164/ipw.cambodiancommunityday/public_html/libraries/joomla/session/handler/native.php on line 151

Warning: session_cache_limiter(): Cannot change cache limiter when headers already sent in /hermes/bosnacweb04/bosnacweb04aw/b2164/ipw.cambodiancommunityday/public_html/libraries/joomla/session/handler/native.php on line 235

jos-Error: Failed to start the session because headers have already been sent by "/hermes/bosnacweb04/bosnacweb04aw/b2164/ipw.cambodiancommunityday/public_html/libraries/koowa/http/url.php" at line 455.

plgSystemKoowa -> exceptionHandler()
JError :: raiseError() @ /hermes/bosnacweb04/bosnacweb04aw/b2164/ipw.cambodiancommunityday/public_html/plugins/system/koowa/koowa.php:147
JError :: raise() @ /hermes/bosnacweb04/bosnacweb04aw/b2164/ipw.cambodiancommunityday/public_html/libraries/legacy/error/error.php:277
JError :: throwError() @ /hermes/bosnacweb04/bosnacweb04aw/b2164/ipw.cambodiancommunityday/public_html/libraries/legacy/error/error.php:202
JError :: handleCallback() @ /hermes/bosnacweb04/bosnacweb04aw/b2164/ipw.cambodiancommunityday/public_html/libraries/legacy/error/error.php:241
plgSystemKoowa -> errorHandler() @ /hermes/bosnacweb04/bosnacweb04aw/b2164/ipw.cambodiancommunityday/public_html/libraries/legacy/error/error.php:780
JError :: raiseError() @ /hermes/bosnacweb04/bosnacweb04aw/b2164/ipw.cambodiancommunityday/public_html/plugins/system/koowa/koowa.php:166
JError :: raise() @ /hermes/bosnacweb04/bosnacweb04aw/b2164/ipw.cambodiancommunityday/public_html/libraries/legacy/error/error.php:277

The live website is running OK. I have Joomla version 3.9.x, Php Version 7.3.2

I have no idea how to fix those things. I have a general feeling that something is outdated since I have not touched it since 2020.
Your help is greatly appreciated. This site is for nonprofits. I have just volunteered to help maintain it.

[pe7er]

Welcome to Joomla forum!

A white screen = PHP error with PHP error reporting disabled.

Joomla version 3.9.x is outdated.
PHP 7.3.2 is end-of live.
Your 3rd party extensions are also outdated.

Upgrading your Joomla website (to Joomla 3.10.12) is recommended (or if your 3rd party extensions support it to Joomla 4). After you've upgraded to 3.10.12, upgrading your PHP (to 8.0 or 8.1) is also recommended. And don't forget to update all 3rd party extensions.