This morning I got emails for each of my Gitlab Pages that are hosted on custom domains, saying that the domain verification failed.
That\'s fine, because I don\'t think
Wait for sometime, it worked for me. Initially, having the same problem as you mentioned.
Also, you may find this page useful: https://gitlab.com/help/user/project/pages/getting_started_part_three.md#dns-txt-record
It might be worthwhile, trying with:
blog.ollyfg.com
instead of: _gitlab-pages-verification-code.blog.ollyfg.com