urn:ietf:params:acme:error:rateLimited: Error creating new order :: too many certificate already issued for exact set of domains:
see https://letsencrypt.org/docs/rate-limits
Unable to get certificate for new host.
Please check this and suggest how we can fix this issue.
You may need to take that up with the maintainer of autoacme (no affiliation to LE).
Quite possibly they only have support for acmev1 not the newer acmev2.
I take that back...
You already have certs (too many) for that same set of name(s).
Like @rg305 pointed out (Thanks!) this error is caused by issuing a certificate for the exact same set of names more than 5 times in one week. Usually this indicates that you have a problem with your ACME client that is causing it to issue duplicate certificates needlessly. It should issue the certificate once, then save it and the private key and use it for 60 days before issuing another certificate for the same set of names.