Hello, I am the author of uacme

I've found that your ACME server returns an empty body when it responds to a request for the account URL given a key according to RFC8555 section 7.3.1, which states "The body of this response represents the account object as it existed on the server before this request"

I have made uacme tolerant of the above discrepancy (see commit) but I think you should probably still fix it.