Do internet search of “Linux xauth file root.serverauth.5527 did not exist”. That should point you to a solution.
Possible explanation: If .Xauthority is not writable, you probably started a program or X session as root using su from your normal user and screwed up permissions in your home directory.
Possible solution: Try (substitute your actual user name for uname):
$ sudo chown -R uname:users /home/uname
That command should be run in terminal or Konsole. sudo is used to run a command as root or super user which are similar to admin or administrator in Windows.