Our project compiles and works on the desktop. When I use CloudBuild the WebGL version compiles correctly. The Windows Desktop version produces the error (IL2CPP) is not installed error 1500: [Unity] ERROR: Error building Player: Currently selected scripting backend (IL2CPP) is not installed. 1501: [Unity] Error building Player: Currently selected scripting backend (IL2CPP) is not installed. 1502: [Unity] Finished exporting player successfully. 1503: ! build of 'default-windows-desktop-64-bit' failed. ! build failed - export directory is empty! 1504: publishing finished successfully. 1505: Finished: FAILURE Before we moved to 2018.3 the desktop version compiled correctly.