I'm posting this here for the archives: I ran into an issue where on a specific machine, one of our apps built with Cloud build, would systematically display the attached error popup on launch: It appeared that this did not happen if the same source code was built locally on the machine. The next thing I found out was that when zipping this local build, uploading (for instance to google drive) and immediately downloading it (the same file), then the problem started occurring. After a lot of trial and error, including starting from a clean project and gradually adding all assets of our project, I found out that the difference was in the ProjectSettings.asset file, specifically in the lines specifying the app icon. So, for app downloaded from the internet With icon: popup Without icon: no popup. Additionally, note that when using unity version 2019.1.8f1 or higher, this popup always occurs for apps downloaded from the internet, even with a completely clean project. Hope that helps somebody.