Problem

Error message  "Authorization Failed" after successful login

in the log file you will read (example for  tum):

20JJ/MM/DD HH:MM:SS - Go - ERROR - failed matching ISS; expected 'https://tum.eduvpn.lrz.de/' got 'https://tum.eduvpn.lrz.de

Reason

Bug in earlier version of eduVPN client for Linux

Solution

Install latest eduVPN client for Linux. in version 4.4. and later the bug is fixed.