New SIM card activation is impossible to update from MU12. It is also no longer successful at the institutions.

[KJAM Want]

I have an MI 9 after updating MUI12, I can no longer activate my SIM cards. When I restart I insert the PIN for the first SIM and see both SIM cards on the screen. after entering the password for the phone they are gone again and I get a server error message.Ik heb een MI 9 na het updaten van MUI12, ik kan mijn simkaarten niet meer activeren. Wanneer