Achkaw

I have looked up every single thing to try and fix this when trying to play with mods for an SMP, but no solution seems to work. It always crashes in the early loading process at a random number whenever I try to start minecraft with the curseforge custom profile. Im sure its the correct version and everything. I've tried changing the arguments and allocating more ram, even reinstalling minecraft but nothing changes. Please, does anybody have a fix for this that might actually work?