[browserstack.local] is set to true but local testing through BrowserStack is not connected

Error Description
Local testing has not been connected through BrowserStack

BrowserStack enables you to run automated tests on your apps against your internal development environments or environments behind a corporate firewall. This feature is called "Local Testing".
You need to Download and Run the BrowserStackLocal binary.

Default Values
Set-Up the Local Testing for Mobile Apps using Appium
Remember to set the browserstack.local capability to true in your tests.
"browserstack.local" : "true"