I don't know if it is ok but there is temporary solution for this bug which is simple, type in your Terminal
sudo mypaint
and it will work! At least i found that it works for some people. It seems like same error is repeating with some other programs and people solved that error by typing sudo in front of program. I tried that wil mypaint and it worked :)
I hope that i am not in breach of some rules but i wanted to share it with people who can not wait to see fix for it.
I don't know if it is ok but there is temporary solution for this bug which is simple, type in your Terminal
sudo mypaint
and it will work! At least i found that it works for some people. It seems like same error is repeating with some other programs and people solved that error by typing sudo in front of program. I tried that wil mypaint and it worked :)
I hope that i am not in breach of some rules but i wanted to share it with people who can not wait to see fix for it.