Beatrun leak (OLD)

Ok, so I have managed to make this leak work. But as someone else said I also experienced thattheres errors and no sounds. I know you gotta change the date but how do I do that? I know I did it before by changing my laptop's date settings to 15 August 2021 but didn't try to restart. But I think I gotta change it in Gmod or the addon. Please tell me how to do that. I'd appreciate it.