gaatec
posted this
28 August 2022
After migrating from Joomla 3.x to Joomla 4.x, I installed the blank Themler template.
I now noticed that when I in Joomla admin backend tried to edit any article I kept getting the error:
Call to undefined method Joomla\CMS\Application\AdministratorApplication::isAdmin()
After a bit of trial and error I found that the plugin called "Button - UPage Content Editor" was the cause of this error.
I simply disabled the plugin, and I was then able to edit my Joomla articles again.
Please note that this plugin might affect other parts of Joomla editing aswell as the articles.
After migrating from Joomla 3.x to Joomla 4.x, I installed the blank Themler template. I now noticed that when I in Joomla admin backend tried to edit any article I kept getting the error: **Call to undefined method Joomla\CMS\Application\AdministratorApplication::isAdmin()** After a bit of trial and error I found that the plugin called "Button - UPage Content Editor" was the cause of this error. I simply disabled the plugin, and I was then able to edit my Joomla articles again. Please note that this plugin might affect other parts of Joomla editing aswell as the articles.Last edited 28 August 2022 by gaatec
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