I figured out a fix for now, since there doesn't seem to be an awnser yet.
In qa-include\qa-db-users.php go to the function qa_db_user_login_sync
Now, replace
qa_db_query_sub('LOCK TABLES ^userlogins WRITE');
with
qa_db_query_sub('LOCK TABLES ^userlogins WRITE, ^users WRITE, ^userpoints WRITE, ^options WRITE');