I currently tried to configure the Workflow Manager Server in my ArcGIS Enterprise 10.8.1.
The installation of the Workflow Manager was finished well, but the server doesn't recognize the license.
As shown on below image, I have the Workflow Manager license, and it authorized on my server.

But, when I tried to change the server role as Workflow Manager, below error was occurred.

Also, there is an error message related with the license in the workflow manager server logs.

Does anyone know similar issue like this case?