Can you try checking your A record and point it to 188.8.131.52
Looks like you can't add a CNAME that points to your naked domain name.
I got the IP by searching where you point your CNAME: travellens.ghost.io
Not sure if that will work though. I tried on my spare domain and points it to Ghost though, but obviously an error since I don't use it. Hope that will route back to your domain.