Thread:Project:Support desk/Upgrade from 1.15.2 to 1.23.0 with section errors/reply (12)

Please add

error_reporting( -1 ); ini_set( 'display_errors', 1 ); $wgShowExceptionDetails = true;

to the bottom of your LocalSettings.php file and then cause the exception again. What is the exact error message you get when you try to edit?

Does this message then appear for all pages or only for those, where you also do not see the content?