Registration validation for CNAME change.

I've been trying to change my CNAME for a while in order to regain access to my suspended email accounts.

This CNAME change would be done by me, together with Google, but we were not succeeding. The final step in making this change is to create a valid record and proceed from there.

My difficulty is validating the records that I created. AWS sent me links on how I can create this record, sent me validation problem links, but I'm still not getting it.

Could you please let me know why I can't validate my records? I would like to attach an image, when possible, showing the steps I took.