GalbimBr

Regarding my problem, I managed to solve it by enabling the option to disable hardware acceleration. I don't know if this is a bug or normal, as my computer is old, but it used to work fine.

Have you tried logging back into your account on the game launcher?

I already don't know what to do because I have already formatted my computer, installed another launcher, and didn't get a solution, but on the official website I can change the skin, however, I don't know why my launcher is like this because it was normal before

The error is only within the launcher. I even thought the problem might be with my account, and I already followed the procedure you suggested, but it didn't work for me.