I tried 5 different credit cards to setup my account and none of them worked for the free tier. Contacted customer support, they simply said “well we can’t do anything about it, it’s clearly a problem in your end and not ours even though you tried 5 different credit cards to pay for the service”.
It could be the issue if above 4g decoding/resizable bar is not enabled: https://gitlab.freedesktop.org/drm/amd/-/issues/3343
had a similar issue that my system would freeze completely after playing FO76, had to downgrade the kernel to get my games to work again.