GTA5-Mods.com'a hos geldiniz

so i just got into gta v modding so i thought this and script hook 5 would be good to start off with. when have this mod installed i wouldnt be able to go do activities with friends like go to the movie theater for example. i know its this mod causing the problem because when i uninstalled this trainer i was able to do the activities. is there any reason why this is happening? because i really like this trainer