TypeError when using Commento from CDN

I'm trying to add Commento to my site using the following guide: https://docs.commento.io/installation/cloud-service/

When following this instructions I'm always getting some error like: TypeError: e is null, TypeError: B is undefined, TYpeError: o is undefined, etc. from commento.js and the comment section is not displaying.

I thought it was because I was testing on localhost, but I tried publishing the site and I am getting the same errors.