"Bad mod data" - Doesn't seem to be caused by mods, have any idea?

Referring to this issue - https://www.reddit.com/r/AoE4Mods/comments/v3dmsa/bad_mod_data_youve_used_a_mod_with_bad_data/?utm_medium=android_app&utm_source=share

My game will crash every single time I use a mod.

I haven’t been able to play nomad all week, the creator of the mod contacted me and he has no idea also. The creator of that thread is using two games that are exactly the same on different computers but only one is crashing. Very confused.