We set up the RingCentral for Lightning in Sandbox with the following criteria and everything worked as intended. However, when using the same configuration in production, the pop up feature does not seem to work at all. If a call comes in, The RingCentral window does not show up at all, and none of the actions below take place. We've gone through the entire guide and compared settings with Sandbox and everything checks out. Here is the configuration we are using: