Hi there,
Your certificate for cdn. is issued by Let’s Encrypt, and they impose a rate limit on certificate issuance per hostname. :Rate Limits - Let's Encrypt
Since this hostname has been added so many times in sequence, they’re currently rate limiting it:
The authority has rate limited these domains. Please wait for the rate limit to expire (07 Mar 24 17:21 UTC) or try another authority.
too many certificates (5) already issued for this exact set of domains in the last 168 hours: cdn.polytoria.com
The certificate has even been correctly issued twice before, so for now my advice is that you should wait and leave the hostname as is while the certificate issued again.
Take care.