Is checkmk SAML 2.0 capable?

After following the steps in the official documentation for Azure AD SAML setup via a custom Enterprise Application, I am able to get “signed in” to checkmk (auto-redirects to my IDP) and upon return I see an empty checkmk with no hosts or dashboards.

When I try going to the user profile settings, I see this message:

At the top of the User popup is my user.userPrincipleName. I have tried manually creating the user, but same result.

Any thoughts?