Thread:Project:Support desk/Updating from 1.17 not working/reply

Hi!

The symptoms that the content, although displayed in editing mode, does not show up in the normal pages, is usually caused by an upgrade of the PCRE package on the server. A MediaWiki upgrade will in fact fix this.

For the upgrade please follow our upgrading guide at Upgrade!

You should enable error reporting in PHP and activate error display in MediaWiki to get more information about what is going wrong. See how to debug for more information!