If this error happens, please…
1. Close Xcode.
2. Navigate to Pods/Target Support Files/Pods-WebViewGold using the Finder app in the WebViewGold main directory and do a click on that Pods-WebViewGold-frameworks.sh file (no double click) while pressing the Control/CTRL key on your keyboard.
3. Click „Open“ and close the window after it appeared.
4. Restart Xcode by opening the main project.