If you haven't yet migrated your Java account, you'll need to do so by March 10th in order to keep playing Minecraft. More info on this can be found here: msft.it/6013wKNMc. ^FF
Please reach out to our Support at msft.it/6012wK20a with that error code, and one of our technical specialists will be able to assist you further. ^FF
Please complete our request form at msft.it/6016wK2iy so that one of our account specialists can assist you with this error that you're seeing in the launcher. Make sure to include this screenshot in your report as well! ^FF
Sorry about any delay you're encountering! We try to respond to tickets as quickly as possible in the order they were received. We appreciate your patience! ^FF
You won't be able to play Minecraft: Java Edition unless you move to a Microsoft account by March 10th. More info can be found here: msft.it/6013wK2Z3. ^FF
Make sure to use an email address that you can access, otherwise the response from Support won't make it back to you! You can just note in the main message of your ticket what the email address is for your Minecraft account. ^FF
Sorry about any delay you're encountering! We try to respond to tickets as quickly as possible in the order they were received. We appreciate your patience! ^FF
If you're having any trouble accessing your account after migrating, remember to use the Microsoft login option with the account that you migrated with, and make sure to remove your old Mojang account from the launcher. See our FAQ: msft.it/6019wK2yF. ^FF