Tyler Cashiering unauthorized client error

Launching Tyler Cashiering environment immediately populates white screen with error message:

ERROR

Sorry, there was an error : unauthorized_client
Invalid redirect_uri
Request Id: 80001eb5-0005-c700-b63f-84710c7967bb (random string)

• Tyler Cashiering (2019 and below)

Incorrect Tyler Cashiering client version.

1. Uninstall incorrect Tyler Cashiering client version

2. Reboot

3. Install correct Tyler Cashiering client version

4. Reboot

Please create a case with TSM support for further assistance in the Support Portal.