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Build Error : App Inventor is unable to compile this project
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8
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124
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June 21, 2026
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Error 507 closing the app.
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2
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62
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June 15, 2026
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Persistent Companion Error: "java.lang.String.equals(java.lang.Object)' on a null object reference"
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2
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70
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June 5, 2026
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Error Code 4200 403
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0
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37
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April 8, 2026
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FAQ Section: Build Errors
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0
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4626
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January 1, 2020
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( Get Device ID) Why Show me Error
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5
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279
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September 15, 2025
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Error message is "The operation + cannot accept the arguments: , ["ot Fo"], [1]"
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15
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1023
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August 20, 2025
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Mit App Inventor Page cannot be dragged in Chrome Browser
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5
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345
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August 8, 2025
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Error 2101 file not found
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4
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702
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July 7, 2025
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Error from Companion: edu.mit.appinventor.aicompanion3: One of RECEIVER_EXPORTED or RECEIVER_NOT_EXPORTED should be specified when a receiver isn't being registered exclusively for system broadcasts
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4
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444
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July 4, 2025
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Build for iOS: Getting Error - Failed to sign
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3
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810
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July 4, 2025
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“err_unknown_url_scheme” error when using WebViewer
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3
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3267
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June 10, 2025
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App inventor error 4200 : error from to chatbot code ; -1 fix
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4
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1189
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February 2, 2025
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Cause of error during output
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5
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450
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January 1, 2025
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Generating icons... Task errored generating android APK
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7
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765
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December 25, 2024
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Error occurs after running ant command when trying to run app inventor locally
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1
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489
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December 12, 2024
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Error 703 unable to play sound
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7
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2550
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December 10, 2024
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Select list item: List index too large
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19
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1882
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December 2, 2024
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How do I fix this error code?
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2
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488
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September 29, 2024
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Bad arguments lookup in pairs The operation lookup in pairs cannot accept the arguments ["field1"],[3494],["not found".]
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7
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1036
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August 29, 2024
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APK Build failed
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1
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642
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August 29, 2024
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Error from companion
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6
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920
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August 27, 2024
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Appinventor (ai2) is bugging so much that it broke my app
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7
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778
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July 31, 2024
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Facing issue with Cloud DB
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8
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1045
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July 15, 2024
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Server error: could not retrieve project information. Please try again later!
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7
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1117
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July 20, 2024
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Error from Companion: register failed, the sensor listeners size has exceeded the maximum limit 128"
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0
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847
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June 26, 2024
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An internal error has occurred when I try to open the project. Help me
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5
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639
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June 24, 2024
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Compilation Error, Can't find class file for screen
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6
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3209
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June 13, 2024
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Necesito ayuda para recibir datos y filtrar 18 datos numericos desde modulo HC 06
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11
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5684
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June 13, 2024
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Error during compile (caught exception in inline compiler)
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3
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782
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June 1, 2024
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