Unable to Unjoin Starling within the Password Manager Admin site. (4298473)

The "Unjoin Starling" button in Password Manager doesn't do anything. Even after deleting the Starling Organization and re-created it with a new trial for Starling 2FA, it does not show any products joined to Starling. Password Manager seems to think it is joined, yet Starling 2FA does not work in Workflows. Error: "System error occurred. Contact your administrator. Error authenticating to Starling 2FA. Details: Bad Request"

How to Unjoin Password Manager?

Pre-Requisite: Add Registry key in the Registry Editor for UnJoin Starling in the following path. Computer >> HKEY_LOCAL_MACHINE >> Software >> One Identity >> Password Manager.

Scenario 1: Active Starling subscription and the client is Joined to Starling subscription

1. Starling subscription is active and the client has been joined to Starling.
2. Update Registry key UnJoin Starling by setting the value to true.
3. Login to PMAdmin Site. Navigate to One Identity Starling >>  UnJoin Starling. Starling has to be unjoined.

Scenario 2: Organization is Deleted from the Starling 2FA page.

1. PM Server is active and has been joined to active Starling subscription.
2. Login to Starling 2FA site and delete the organization.
3. Update Registry key UnJoin Starling by setting the value to true.
4. Login to PMAdmin Site. Navigate to One Identity Starling >>  UnJoin Starling. Starling has to be unjoined.

Scenario 3: Unable to connect to Starling during Unjoin (Starling Service down/No Internet/Offline customer).

1. PM Server is active and had been joined to active Starling subscription earlier.
2. Make sure the PM Server computer is offline/with no internet connectivity.
3. Update Registry key UnJoin Starling by setting the value to true.
4. Login to PMAdmin Site. Navigate to One Identity Starling >>  UnJoin Starling. 
5. Error message is displayed on the page (System error occurred) and log is generated in the windows event viewer (Error occurred while sending the request).
6. Connect to Internet.
7. Login to PMAdmin Site. Navigate to One Identity Starling >>  UnJoin Starling. Starling has to be unjoined.

Scenario 4: Migration from lower versions of PM to 5.7.1/5.8.2 and Starling Subscription is entered.

1. PM Server is active and Starling subscription information is saved.
2. Navigate within PMAdmin >> General Settings >> Starling Two Factor, Starling Subscription Key, Email Address and the Phone Number used during Starling account creation is entered.
3. Navigate to General Settings >> Import/Export Data. Export the data and copy the password.
4. Migrate to the latest version of PM (5.7.1/5.8.2)
5. Navigate to General Settings >> Import/Export Data. import the data by entering the saved password earlier.
6. Navigate to One Identity Starling >>  Join Starling.
7. Update Registry key UnJoin Starling by setting the value to true.
8. Login to PMAdmin Site. Navigate to One Identity Starling >>  UnJoin Starling. Starling has to be unjoined.

Scenario 5: Starling subscription is expired.

1. PM Server is active and had been joined to active Starling subscription earlier.
2. Starling subscription has been expired.
3. Update Registry key UnJoin Starling by setting the value to true.
4. Login to PMAdmin Site. Navigate to One Identity Starling >>  UnJoin Starling. Starling has to be unjoined.

See screenshot attached