If you are having issues on BIGSUR (Mac). Open a terminal window, copy and paste: sudo chmod -R 755 and then drag and drop the application into the terminal window from your FINDER window, press Return. You have to do this because the OS needs the full path to the file, this is the easiest way to do it! It will ask you to type your password when you hit Return.
BIGSUR broke a lot of apps, including this.