What is the reason this setting causes the WebRTC softphone to drop registration immediately after login? We are migrating agents from Zendesk Talk to Genesys Cloud, and the transition is supposed to be seamless, but the softphone integration is failing. In Zendesk, the browser-based agent interface just worked with standard HTTPS. Here, the Genesys Cloud Agent Desktop loads, but the ‘Ready’ state never triggers. The browser console shows WebSocket connection to 'wss://api.euw1.genesyscloud.com/...' failed followed by a 403 Forbidden error on the /v2/telephony/phone endpoint. We have verified that the genesys-cloud-sdk version 2.5.0 is loaded correctly. The environment is Genesys Cloud EU Central. The user role is mapped to ‘Agent’. However, the softphone fails to initialize the WebRTC peer connection. It seems like the tenant configuration for WebRTC is rejecting the client certificate or the WebSocket handshake is failing due to a mismatch in the expected protocol version. In Zendesk, we did not need to configure any specific WebRTC settings for the browser agent. What is the equivalent configuration in Genesys Cloud Admin that needs to be enabled for the WebRTC softphone to function properly during this migration?