Thread:Project:Support desk/SMF Mediawiki integration - cant log in to mediawiki/reply (3)

Ah, that looks like it is SMF/Users_Integration from this site. You should contact Nicholas Dunnaway to see if he could update the code.

Alternatively, you could switch to another SMF extension. I just searched for "SMF" and found a few. The most promising looks like it is SMF Auth Integration -- see the installation notes that were updated within the past year, which includes a link to this thread.