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Amazon web services – Amplify build fails due to '"appRoot" key needs to be a string'

After merging a new pull request in my GitHub repository, the automatic build of my Amplify App fails due to ‘Invalid Monorepo spec provided. The "appRoot" key needs to be a string’.

I have not changed any of the settings of the repository or amplify app including the environment variables. When checking the environment variables and build settings, they both look like this:
build settings
environment variables.

I have tried reconnecting the repository as well as merging a test pull request to trigger the automatic build, however it still fails.

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2

Answers


  1. Chosen as BEST ANSWER
    0

    I was able to fix this issue by changing my yml from:

    applications:
  - frontend: ...
    appRoot: frontend
  - backend: ...

    to:

    applications:
  - appRoot: frontend
    frontend: ...
    backend: ...

    where the appRoot: frontend is the root of my monorepo


  2. 0

    Others seem to be running into this as well, this Issue has a resolution that seems to be working.

    In short, a recent validation was added for the buildSpec. One possible work-around is to remove the appRoot key.

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