On my Windows 10, I installed Microsoft Azure Bot Framework Emulator from the here (I had used botframework-emulator-setup-4.0.15-alpha.exe from the GitHub link tha
botframework-emulator-setup-4.0.15-alpha.exe
Install ngrok tunneling. https://github.com/microsoft/botframework-emulator/wiki/Tunneling-(ngrok)
Restart the emulator once installed.