Johnnyloans I'd see if other EU users on the other GOS communities know about getting curve to work.
In the same way as often written here in the forum. Maybe more recent versions of Curve are making more problems.
For me Curve is running fine since the setup finally was successful, except that 2 step payments won't work on each terminal, in such a case I have to unlock the phone completely. Another issue is, I don't have access to the Curve launchpad anymore, but that's no problem for me, I've made all necessary settings before, however sometimes I would like to take a look if new privacy options were added after an update and if it would be better to enable/disable them.
Johnnyloans Maybe there's an issue with your account, bank, and/or card inside their system.
That's possible. If I remember correctly, after adding card essentials the Curve app redirects to the banking app for further verification, in my case Revolut and finally Revolut caused the issue, I had to select SMS verification, in standard Revolut tried to verify by email and barcodes, what didn't work.