@Biggdogg Sorry for late response. I tried and it worked so thank you for your help!

So basically, I downloaded the Grand Theft Multiplayer mod last week and when trying to start it, it popped saying my Grand Theft Auto V files are corrupted that I should verify or reinstall. It's my own fault to be honest, I had the intention of making a backup as the modders who created Grand Theft Multiplayer said to do so and it slipped my mind. Is anyone able to help me? I would like to get away with not reinstalling as my disc tray is giving me trouble.