Error provisioning TLS certificate for new subdomain

Hi,

I’ve asked about this error before, but I haven’t been able to get anywhere. What I did: add new domain alias so the subdomain autodiscover.example.com is included in the TLS certificates list. When I click the blue provision button I get this error:

autodiscover.example.com

Something unexpected went wrong: [NeedToInstallFile(‘http://autodiscover.example.com/.well-known/acme-challenge/Hmo6giAPUocggmTkKVp6IzTUinjcpo970KMRbccEZQM’, ‘Hmo6giAPUocggmTkKVp6IzTUinjcpo970KMRbccEZQM.6FfPp-Ovtg_39pZRnZSfT-ypgbiyJpueVG97TSZkVLk’, ‘Hmo6giAPUocggmTkKVp6IzTUinjcpo970KMRbccEZQM’)]

Log:
Reading account key from /home/user-data/ssl/lets_encrypt/account.pem.
Validating existing account saved to /home/user-data/ssl/lets_encrypt/registration.json.
Requesting new challenges for autodiscover.example.com.
Validation file is not present — a file must be installed on the web server.
Reading account key from /home/user-data/ssl/lets_encrypt/account.pem.
Validating existing account saved to /home/user-data/ssl/lets_encrypt/registration.json.
Reusing existing challenges for autodiscover.example.com.
Validation file is not present — a file must be installed on the web server.

Regular certificate renewals have been working fine, I only get this error after adding a new subdomain. I have tried adding a different subdomain (like testcert.example.com) and gotten the same result. I would just go to startssl and get a free 3 year multi-subdomain certificate but I can’t now since new certs from them are distrusted in browsers.

Merry christmas everyone!

I hate to bump this, but I don’t have a solution. Could it be a permissions issue? Anyone have any ideas?

I just came across this error myself, but in my case it’s a domain alias instead of a subdomain.