i just deleted my old module and started downloading c-RPG again, the launcher didnt give me a critical error so if it works ill let you guys know.
Yup, this solution is working fine.
I checked which file was causing this problem, and it was "filelist.txt" file.
Much quicker solution to this problem (than downloading whole module again) is to go to "X:\Mount & Blade Warband\Modules\cRPG", delete "filelist.txt" file, and then in the launcher tick "repair" button. It will skip downloading unnecessarily files this way.