Whenever I start the game with my class mod (the version dowloaded from the steam workshop)
I get this error and then the game crashes:

Assert failed:
(skel_file_entry->m_DataSize !=0)
spineDataFactory::LOADINGTHREAD_Build in spineDataFactory line 87
couldn't read file heroes/coso/anim/coso.sprite.idle.skel

Assert failed:
(atlas_file_entry->m_DataSize !=0)
spineDataFactory::LOADINGTHREAD_Build in spineDataFactory line 88
couldn't read file heroes/coso/anim/coso.sprite.idle.atlas

Assert failed:
((uint32) character_count<size)
BinaryReader::ReadString in utils/h/binary_reader.h line 179
buffer too small!

I haven't done anything with the .skel/.atlas files other than renaming them for the mod. Instead whenever I use my testing version ( the same version from the one on the workshop but it's already installed into the vanilla files) it works perfectly, no debug errors.

I don't have any idea about what this error could be so please, can someone help me?

P.S. whenever I launch the game with the workshop version and with the debug output on, it shows me that all the ability functions(buff, debuff etc.) can't be opened but, the file inside the folder is the perfect copy of the one that I use for testing.