Earlier today I was trying to do some sketching in Krita when my brushes started acting up all of a sudden.
Now every brush I try to use uses the erase function instead of its intended function and I have no idea on what to do.
Is there anyone who had this sort of issue in the past? Some help would be very much appreciated.

Check whether the active blending mode for brushes isn't Erase or whether the Erase button is activated.

Alright so I just found out what the problem was. Turns out my brush color was the same as the background the whole time! I'm such an idiot
Thanks for the help nonetheless