Is this using the 2.2 server or the 2.1.3 server? Also, I noticed you have some extra mods added- it might be one of them.
(of course, if you are on the older server build, update, then let me know)
im using the 2.2 download from your site and i did try it with mfr and then tried it after i removed mfr and is the same error.