Was trying to use ios-webkit-debug-proxy to connect to latest iOS 13 Beta on iPhone 8.

After running the command:

ios_webkit_debug_proxy -c 10e43da25a9174d34a07a9287c5d709f8xxxxx:27753

Output:
Unable to connect to iPhone (10e43da25a9174d34a07a9287c5d709f878xxxxx)
Please verify that Settings > Safari > Advanced > Web Inspector = ON

Even though I can confirm that the option is set to ON, still the error persists.

When running an appium session, I get an error because of the same reason

An unknown server-side error occurred while processing the command. Original error: Could not start ios_webkit_debug_proxy server: Timed out waiting for ios_webkit_debug_proxy to open (Selenium::WebDriver::Error::UnknownError)