Tag not monitored by Microsoft.
Hi Muhammed,
Thank you for posting, I am here to help you. Possible cause of this problem is due to Microsoft account you're trying to use is already linked to another PlayStation Network (PSN) account.
To fix this follow this steps:
Close the Minecraft launcher and any running Minecraft instances. Go to Task Manager to ensure all Minecraft processes are ended. Log out of your account from the Minecraft launcher. Sign back in to restart the connection process.
Let me know how this goes. Looking forward to helping you out. If you need more help please feel free to let me know.
Best regards,
Jansher