EmberJs 3.27 App in nested folder gets Uncaught RangeError: Maximum call stack size exceeded

I would like to serve my Ember 3.27 app from a sub folder '/v2/web'.

From a fresh project I have set rootURL: /v2/web' in my environment.js file and set the correct outputPath in my .ember-cli file. However the app won't run. I just get a white screen and 'Uncaught RangeError: Maximum call stack size exceeded.' in my console.

If I reset rootURL to the default '/' and then run ember serve, the page loads fine.

Any ideas anyone?