Not sure the point of linking this. But adding some thoughts to your issue:
Apparently, there’s a new list incase you still haven’t noticed. And following that I don’t think Uphold supports Switzerland anymore. As the notice said, the change was effected immediately so maybe when you tried reconnecting your Uphold Wallet on your Linux-pc, the work behind this new notice was already done.
So, the only answer to your issue:
Once logged out or disconnected from Uphold, users in unsupported regions will not be able to log in again or re-verify Brave Rewards with Uphold.
Link for the new notice adding again in this thread: