Can't add custom domain to Cloudflare worker

[Jay12]

Hi I have been setting up Dynamic meta data following the documentation. I was able to deploy the worker but when I try to add a custom domain to the Worker, I get the erorr saying I can’t add custom domain.

I have already DND record for that custom domain on Cloudflare though…
Anyone could help? thanks in advance!

[Jay12]

I am really struggling with this. Does anyone could help?

I already have record in DNS setting which I am using for www redirect but this is something I can’t remove.