I recently tried to update my Joomla version from 2.5.8 to 2.5.11.
I encountered some problems so I decided to restore from a backup and I got the site back to 2.5.8.
Now my site works (frontend and backend) except for the editor (JCE). The page loads for a while and then stops with the following javascript error:
NetworkError: 500 Internal Server Error - http://www.isathens.gr/administrator/index.php?option=com_content&view=article&layout=edit
index....ut=edit
ReferenceError: Joomla is not defined
Joomla.submitbutton = function(task)
I am not very familiar with Joomla and I looked into the problem, but I cannot find a solution.