Last time I heard, Langer was experiencing very poor health. He hasn't been on the forum for a few years now, and frankly, I hope he's just "retired" and not "expired".

However... Your issue.

I have found EP 1.2.5.4 to be the most reliable of the free versions.

I'd suggest (as your project is urgent) that you UNINSTALL the commercial version - and put 1.2.5.4 in there.

(Later, set up a TEST site and try the comm module again)

Read my WIKI on 1.2.5.4 (where there is also a link for the download.