I can partially make sense of it: this is the same error I had.
However, if possible, could you scroll a bit up in the log? It does not matter if you are not at school anymore, the log should still be available. However, if you turned off the system, you may need to run
sudo journalctl -b -1
instead. Replace -1 with how many time you rebooted since the last test (e.g. -2 if you turned off twice).
In my case the issue was solved by updating the certificate to a newer version by rerunning the installer from my university, as the old one was considered self-signed (that's what it said in the lines I'm asking you, which is why I need that context).
Just a few additional questions:
- was the old eduroam connection deleted?
- did you modify the downloaded script? The lines do not match with the error you get when running on python3. The errors says that it cannot find the
byte_to_string function, but that function is there (line 85 in the script I just downloaded)
