I made a 2D game and tested it out in Gameroom in Debug mode and all works fine. The build succeeded with no errors and it ran fine too. I copy pasted the App ID and the Upload Access Token. Now, when I finally tried to Upload Last Build to Facebook, it's giving me the error of which I have attached a screen-shot. To be clear, I did the following: Created the game and switched build to Facebook. Unity downloaded the Facebook SDK and I switched to the latest version i.e 7.13.0 Created an app in Facebook Developers page to get App ID and set GameRoom active Copied the App ID and Upload Access Token and pasted it to the respective fields in the Facebook Player settings. Please help! Edit:I removed the deleted scene from the build and that didn't help.