This happens because the game is looking for EUP textures that are no longer there. Make sure you have deleted the EUPMenu.dll so the game stops trying to call those assets.
Uninstalling the Emergency Uniforms Pack (EUP) Law and Order Patched how to uninstall eup law and order patched
After manual removal, use Rockstar Launcher or Steam to verify file integrity: This happens because the game is looking for
This will remove all mods installed via OpenIV, not just EUP. 2. Remove the EUP Menu Plugin how to uninstall eup law and order patched