ERROR uploading build results Error: Failed to upload file

Example Error

file invalid: /usr/src/app/www/public/news/microsoft-reveals-super-cheap-surface-laptop-se-for/index.html

14:02:32 PM:
ERROR uploading build results Error: Failed to upload file /usr/src/app/www/public/page-data/app-data.json with status 500
    at Uploader. (/snapshot/app/services/cloud-runner/dist/controllers/uploader.js:0)
    at Generator.next ()
    at fulfilled (/snapshot/app/services/cloud-runner/dist/controllers/uploader.js:0)
    at runMicrotasks ()
    at processTicksAndRejections (internal/process/task_queues.js:95:5)

When you have a site using tailwindcss with a purging configuration containing "./public/**/*.html", it could cause this problem because Gatsby is watching the public folder and may trigger additional compilations during build.

To fix this, you can take out "./public/**/*.html" from tailwind.config.js

 Here's the official tailwind docs which shows the correct config