We recently moved a Media Wiki site to a new host; several issues, all seemed resolved as of last week.
A new issue came to light late last week. See attached.
A person who worked on this site a long time ago said he thought it was caused by a missing "add on". That person is not available to work on the site at present.
I still have access to all the folders, files, database at the prior host. If I did not pull something over, I can still get it but I don;t know where to look.