Error: A certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider. (Exception from HRESULT: 0x800B0109)

You may get this error during certificate request/assign.

Error: A certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider. (Exception from HRESULT: 0x800B0109)

Install the Root CA cert chain on the server and run the wizard again to resolve the problem.