how the hell do i fix this?

[Infinite Kyo]

so i am using the King of fighters Memorial level 2 screenpack by Zelgadis and i try playing as numerous characters but this shit keeps popping up

PLEASE HELP!!!!!

 

[PlasmoidThunder]

Seems like the screenpack included its own common1.cns, which includes coding that's incompatible with the WinMUGEN characters in your roster.

The fix would be to change the mugenversion of every character to 1.0, which can be found in the .def file.