Seems that it’s not easy to get this to work with /e/OS … MS Intune company portal unable to register
And I think it’s worth to read the corresponding GitLab issue from here on (at least) … https://gitlab.e.foundation/e/backlog/-/issues/5978#note_584709.
There’s work going on to make it possible to use the App, but this has compatibility and liability implications. You could ask your company’s IT department beforehand whether they would even accept what Murena are trying to implement here.
Did you already reboot the phone?
Else you could try to force-stop the app store (App Lounge or Aurora Store?) and restart it, or if that isn’t enough you could try to delete its cache, or even its data, then try again.