Cupid : Went back to stable Xiaomi.eu (with format :( ) . The wallet works fine .
I had the same problem with Mi 9 . I made a fastboot istallation and locked the bootloader (:(:() - then everything is fine .
I can not register any new cards on cupib (Xiaomi 12 ) . I get the same message . I have only 2 cards on the wallet . The payments until now are OK .
Update :
Today I can NOT make any payment with the existing cards ...