Make sure your game is updated.
Check your appdata mods folder (where dl maps are installed) for loose files not inside a maps folder.
Try with or without t4m.

T4M? And I have the...

I have tried everything. Almost 50 maps that I have fully installed and many directly off the UGX official Maps and still had them crash on me. The only 2 maps I have gotten to work were UGX Christmas and MW2 RUST.
For other maps it usuall...