Problem with MS-Account

[BBZ-SolothurnGrenchen]

We have the same problem with one our students SEB. A student can no longer log in to a session with our Microsoft account. The ‘.seb’ file can be opened without any problems and his login in Classtime works, but as soon as he tries to log in in the SEB, this is done up to the point where you get to our login portal. Then you have to choose whether you want to stay logged in or not, as soon as you select one of the options the login continues to load indefinitely.

There is maybe a similar issue asking for the same solution. It's not the exact same. I subscribed to that Q&A threat aswell, so I'd get notified when there's a solution to that problem, if that would fix my problem aswell I'll mark this threat as solved aswell.

Here a picture of the login that isn't working, or not proceeding to load:

I have tried several things to fix this error, the device is only used by him for school and nothing else, also I can't find any antivirus, network settings or vpn services that could cause this problem. I have tested versions 3.2-3.4 and got the same result with all of them.

Our current workaround is that he does the tasks and checks on another device (here the login works fine and he can use everything), but this should only serve as a temporary solution. so that he can use his MacBook in the future, I would be glad if you could help us further.

Please do not hesitate to contact me if you have any questions or require further information.

Thanks in advance

with kind regards
BBZ Solothurn-Grenchen