Cannot create new content 3.1.4

From Joomla! Documentation

Revision as of 12:00, 28 July 2013 by Elin (Talk | contribs)

Some users report that they receive the following error when attempting to create new content (of any type):

HTTP Error 500 (Internal Server Error): An unexpected condition was 
encountered while the server was attempting to fulfill the request.

or with maximum reporting on

Fatal error: Invalid opcode 153/1/8. in 
/var/.../libraries/joomla/table/observer/tags.php on line 159

This appears to be caused by a bug in eAccelerator. Either update to the current version or change your caching method to a different option.