Cannot read property 'split' of undefined

Hello,
I am facing error while deploying my gatsby site.

Site Name: elated-neumann-e38244.netlify.app

Here is build error log:
9:31:24 PM: failed Building production JavaScript and CSS bundles - 21.467s
9:31:24 PM: error Generating JavaScript bundles failed
9:31:24 PM: Cannot read property ‘split’ of undefined

Build failed due to a user error: Build script returned non-zero exit code: 2

You can check full build link

Build Settings:

These are steps i have tried so far:

  • Adding environment variables NODE_VERSION to 14.15.0. This is the version on which i build on local machine.
  • Adding environment variable NPM_VERSION of 6.14.8 as per my local machine where build works fine.
  • Clear cache and deploy site