I got [ReadBuildInfo] Starting Task [ReadBuildInfo] Task errored notification when building project

[Chau_Len_Bar]

There is something wrong with my project and I have no clue what caused my project to get this error notification: "App Inventor is unable to compile this project.
The compiler error output was [ReadBuildInfo] Starting Task [ReadBuildInfo] Task errored". The project worked properly on AI2 Companion but when building this app it got this error. Does somebody know what could cause this to happen?
My .aix file:
RelayApp.aia (637.2 KB)

[Taifun]

you have a project inside your project
probably happened because you imported a project as extension?
try this one
RelayApp.aia (562.7 KB)

Taifun

[Chau_Len_Bar]

Oh wow thank you so much for your help, I imported your file and it worked but I don't think I have imported my project as an extension or something. My progress is to build this app, test it on AI2 Companion, and then finally build the app. Could you possibly tell me how you solved this bug?

[Ria_Das]

See

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

Here is a guide (video instructions) on how to fix the problem that a project cannot be compiled: "App Inventor is unable to compile this project." [grafik] Possible reason: there is a project in a project. Caused by an extension that was imported from another AppInventor clone (here: AppyBuilder). This issue is now also increasingly reported in App Inventor, e.g. here: My app is getting server issues and here: Unable to build apk! See here how to fix this: