RepCom White Screen

So, whenever I try to use the unrealeditor within the system files for Republic Commando, it loads up correctly but there’s a white screen where all of the textures and such should be for each map. The fix that everyone uses, which is to reconfigure the viewports does not work. I got no idea why this is and I’d appreciate some help.

This is not a good place to ask this. You want answers from the people who have made the files for Republic Commando.