Recently I have been unable to open certain mods in freeplay an example of this from today is geta_challenge.tbm

When I attempt to load the mod I get this error message

Unable to open mod data/mod/geta_challenge.tbm/_test2.tbm
Unable to load mod geta_challenge.tbm/_test2.tbm

File Location: CProgram Files (x86)\Steam\steamapps\common\Toribash\data\mod

Thanks ~ suggestion 1 worked.