Using classic Outlook for Windows in business environments
If you are getting the same error after BOTH successfully configuring a new Outlook profile AND not being able to create the profile (when trying the manual setup), it is almost certain that you are starting Outlook using the same profile in both cases which means that the default profile was not set correctly for Outlook to use.
Perhaps you can provide screenshots of what the default profile is set to and the email / data file tabs associated with that profile.