Extension is using ajax api which was removed in mediawiki 1.38
no events are displayed nor is it possible to create new ones.
Topic on Extension talk:MsCalendar
Fixing this requires substantial rewriting which I'm not about to make, so I'm marking this extension as incompatible with MediaWiki 1.38+
This is such a useful extension. It appears that the
- Ajax action that was deprecated in 1.27 now has been removed.
Can't you replace your calls with something using jQuery?
Your calendar is just great and it would be a loss to the community if it is no longer supported.