When starting the Active Roles Administration Service normally, the startup process never completes and it is not possible to connect with any credential.
If Safe Mode is attempted, the Active Roles Administration Service startup completes and it is possible to connect with an Active Roles Admin credential.
A full review of all custom scripts will be necessary in order to determine the fault. Enabling verbose logging will be helpful.
NOTE: It is expected that Active Roles will execute the OnInit functions of all scripts during startup, even those which are not currently linked to a Policy Script. If an OnInit function attempts to perform an operation which does not succeed, this could result in an error which would interfere with the normal Active Roles startup process.