Hello user l,
Welcome to Microsoft Q&A forum.
I see that you are having issue installing Minecraft. Before we proceed, I'd like to know a few things to better understanding the situation.
- May I know if this only happens when downloading Minecraft or also happens when downloading another apps?
- Did the sign in issue happens with any other Microsoft services?
- May I have a photo of the situation to check for you please remember to remove all personal information before posting.
In the meantime, you can check this fix.
- Go to Settings > Apps > Installed apps.
- Select the ellipsis next to the Microsoft Store and the Xbox app and select Advanced Settings.
- Select "Reset".
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