When I try to change my country of residence from US to Canada, the process never succeeds.

I suspect it has to do with the fact that it is automatically selecting Euros (which is not the right currency for Canada):

Change payment details

9.99 EUR + tax per month. An update to your current subscription will be reflected on your next billing date.

The error that I get: Oops, seems your card or payment provider is having a bad day. Don't worry, no money has been charged. Try again or use another payment method.

I can confirm that my credit card is fine, and suspect this has to do that there is a bug in a first place (Euros...??)

Thanks in advance

Steeve