Sounds like a CRUSADERS_UNIT_PROD11.TXT -related problem, at least I got them when I was sloppy modding the files, but I don't have too much modding experience and it might be any of the other unit-related files I guess.

Try replacing the crusaders_unit_prod11.txt and the crusaders_build_prod13.txt in case they're corrupted or something. Or wait for a while as someone who really knows about this stuff comes along and finds a real solution.