Are you sure your microsoft account is fine Last time I personally encountered something like this, it was due to a security warning on my account which required me to verify my identity to Microsot before it resolved.
Microsofts standard solution for this issue is to hard reset. Before doing that, perhaps you could try a reboot. If still not then try some variation on the language and region settings. Example, If you set country to UK, then set language to English etc. None of this works, then you could consider a reset.