We are facing issues while using the protocol handler for outgoing calls from Webex desktop application. The protocol handler we are using in a web browser is webex (for example: webex:(phone number)) and it results only in opening the Webex desktop application, but the phone number is not called.
The Webex app is set as a default for the webex protocol handler:

Additionally, we have tried using a different protocol handler for another feature (creating a space), and that one launches it correctly. Could it be that we are missing some additional setup?