I have mediawiki 1.28 on a hosted platform. I want a feature, if someone creates or edit a page on my wiki, the user has to submit that page to admin and when the admin approves that, then only the page published on the wiki (just like Wikipedia).
Topic on Project:Support desk
That is done with Extension:FlaggedRevs!
No, Extension:FlaggedRevs! is not working on 1.28.
Extension:FlaggedRev is compatible with MediaWiki v1.28.
Can you be more specific about exactly what error you're receiving?
See methods outlined in How to debug to get detailed information regarding errors.
There's also Extension:Moderation