Hi,
I will help you on this. Via https://help.minecraft.net/hc/en-us/articles/38555497091469-Named-Error-Code-Troubleshooting-for-Minecraft-Bedrock-Edition
Guardian
- What it means: There was an issue while signing in.
- How to troubleshoot: See Reset Your Microsoft Account Sign-in in Minecraft.
Sign out and in using the Launcher
- Start the Minecraft Launcher.
- Select the dropdown menu in the top left corner with your Gamertag.
- Select Log out.
- Select Microsoft Login and sign back in.
- Select Sign in with a different account if you need to switch accounts or select Lets Go to continue.
Sign out and into Minecraft on Xbox
- Close out of Minecraft: Bedrock Edition if it is open.
- Go to the Profile & System tab.
- Select your account.
- Select Sign Out. Your profile will be saved and accessible the next time you sign into this console.
- Sign back into your profile.
Sign out and into Minecraft on PlayStation, Nintendo Switch, and Mobile
- Open Minecraft.
- Select Settings.
- Select Account.
- Select Sign out of your Microsoft Account.
- Select Sign in for free!
- You will be presented with an alphanumeric code and prompted to go to aka.ms/remoteconnect.
- Once you have gone to the Remote Connect page, enter the alphanumeric code you were given.
- Enter your Microsoft account credentials and sign in.
I look forward to hearing from you to get the results of the troubleshooting.