Is this in one error message or three? If there, its a problem with autodiscover - you need a new profile.
You need to set this key before making the new profile- but at this point, I would switxch to the click to run version first.
HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Autodiscover
DWORD: ExcludeLastKnownGoodUrl
Value: 1
If the key does not exist, you need to add it.
Outlook cannot connect or web services cannot work after migrated to Microsoft 365 - Outlook has info on setting the key.