I've tried to run this mod but even with all patches it was giving me errors. I made some research and found few small bugs. Small but absolutely crucial. E.g. one typo in the unit_prod file was ruining about 1/3 of the units list. I'm surprised that campaign was even starting. There were some missing units in the deadpage file too causing bodies didn't appear on the battlefield. I've corrected these bugs and prepared a little patch:
AoW_unofficial_patch_1_31.zip
Installation: copy the archive to game directory (the same as medieval_TW.exe) and unpack.

I can't guarantee that there are no other bugs. I didn't play even one turn - only fixed some obvious mistakes.
If you encounter any other bugs, let me know. I'll do my best to fix it.