Thread:Project:Support desk/My Images Tag does'nt work correctly after upgrading/reply (3)

I don't know why that worked in your old wiki, but that syntax doesn't make any sense, since  links are for direct-linking files uploaded on the wiki itself, not external ones.

There's no way to make those links work as before, unless you hack into MediaWiki core (this could probably be done in a more clean way using a hook).

I'd recommend rewritting all such links with a bot. Maybe Extension:Replace Text could be used to easily do the replacements, using regular expressions.