I’ve seen this error before and it has been one of two things:
- The Management Reporter 20123 Application Service isn’t running
- The logged in Windows user has not been given access to Management Reporter
In this instance the problem was the latter. The IT team member’s own domain account was configured as a Management Reporter Administrator, but he was logged onto the server as Domain\Administrator which was not a Management Reporter user. After logging out and back in under his own domain account he was able to access Management Reporter successfully.