Hey!I encountered some problems during the account migration process.After I entered the verification code and logged in to my Microsoft account, the page in my picture popped up. I followed the suggestions on page and retried a few times with out get better.@MojangSupport
Please send us an email at https://msft.it/6019nNb15 and we will assist. Remember to attach your Transaction ID and account name / Gamertag. ^FF