Hi guys,
If you are facing this problem, it means there is some problem in the gen folder in your project. So the best solution to remove this error is to Clean build your project. So just go to Project -> Clean. It will clean the project and now build the project. If it doesn’t work then its better you delete gen folder and do the above steps again.
And Still if it doesn’t work I will suggest you to take back-up of your project and create a new project and now copy the content from old folder to new one. It will work.
