In order to fulfill the basic functions of our service, the user hereby agrees to allow Xiaomi to collect, process and use personal information which shall include but not be limited to written threads, pictures, comments, replies in the Mi Community, and relevant data types listed in Xiaomi's Private Policy. By selecting "Agree", you agree to Xiaomi's Private Policy and Content Policy .
2.) You could try to disable the App "Xiaomi SIM activation service" in Configuration-Installed Apps. That should prevent the Error messages but you might not be able to log into Mi Cloud, Mi Account,... anymore.