I wanted to try multiclassing on my character, but i realized it jsut wasn't for me rn. So i tried removing the class, and i literally cant remove it. It keeps coming up with the same error code every time i click confirm to remove it. So now my character is ruined.

Please post the url to your character sheet so someone like a mod can take a look.

https://www.dndbeyond.com/profile/Blend_it/characters/68984001/builder#/home/basic

Is it the Wizard level? Technically, you wouldn't be able to multiclass into Wizard anyway, since your INT is below 13.

Its the wizard, and the barbarian. I had a int of 13 originally but i tried lowering it to see if it would fix it but still didnt

Yeah, the character builder isn't going to kick you out of a multiclass just because one of the ability scores is lower; heck, you can even turn off multiclass requirements in HOME | Preferences so it won't enforce them when you add a class.

In any case, a mod will need to take a look and see what's going on.