"App Inventor is unable to compile this project." Error may be caused by: → Project in a project

[ABG]

(added to FAQ)

FAQ Section: Build Errors

apk Install Errors Google Play Protect Unsafe App Blocked - @Anke Build Errors [PrepareAppIcon] Task errored - @Boban [PrepareAppIcon] Task errored - @TimAI2 [ReadBuildInfo] Task Errored - (Project inside project) - ABG Naming a button 'back' or 'take' causes build errors - @Boban apkSigner execution failed - SteveJG Build Server Status - MIT Build Servers Overview Bar Graph app - ABG nb184 - Compiling error: SteveJG's Monster List of Build Errors Build app QR code regularly stops …