Since half an hour ago i've got this line in my front camera, i tried rebooting or disabling 5g, but unfortunately it did not fix the problem.
Can someone help me out?
This looks like it may be hardware issue rather than software. But you could try going into settings->apps->camera force stop it. Go to storage and clear cache and data. If that doesn't work you should see if where you bought it from can suggest a place to bring the phone in to have someone look at it.