- Plesk Onyx for Windows
- Plesk 12.5 for Windows
Installing Let's Encrypt certificate on the domain fails with one of the following error:
PLESK_ERROR: Error: Could not issue a Let's Encrypt SSL/TLS certificate for example.com.
The authorization token is not available at http://example.com/.well-known/acme-challenge/yNjx7aQ8PM07vmJGa4oxSisY6TArt3wxIH2WJ95uozU.
The token file 'C:\Inetpub\vhosts\example.com\httpdocs\\.well-known\acme-challenge\yNjx7aQ8PM07vmJGa4oxSisY6TArt3wxIH2WJ95uozU' is either unreadable or does not have the read permission.
To resolve the issue, correct the permissions on the token file to make it is possible to download it via the above URL.
See the related Knowledge Base article for details.
Invalid response from https://acme-v01.api.letsencrypt.org/acme/authz/QfoMB10JmKvmi9flCwWkXaC07fyVXr5KpAjQi5NJYpU.
Detail: Invalid response from http://example.com/.well-known/acme-challenge/yNjx7aQ8PM07vmJGa4oxSisY6TArt3wxIH2WJ95uozU [203.0.113.2]: 500
PLESK_ERROR: Error: Could not issue a Let's Encrypt SSL/TLS certificate for example.com. Authorization for the domain failed.
Invalid response from https://acme-v01.api.letsencrypt.org/acme/authz/xytECea16Tdd1BcyDtyoeEDgZ-mI-LosrFtlMKH3BuQ.
Detail: Fetching http://example.com/.well-known/acme-challenge/SnzniqzGmexAIoINQGNlFE4sS6iDBjD2gI6r8PF1y_s: Timeout
PLESK_ERROR: Error: Let's Encrypt SSL certificate installation failed: Failed letsencrypt execution: Failed authorization procedure. example.com (http-01): urn:acme:error:unauthorized :: The client lacks sufficient authorization :: Invalid response from http://example.com/.well-known/acme-challenge/FpudeTlHgkrlU34as62taMhVLxMY0HwmyCJyeQj0lZk [ 203.0.113.2]: 500, www.example.com (http-01): urn:acme:error:unauthorized :: The client lacks sufficient authorization :: Invalid response from http://www.example.com/.well-known/acme-challenge/MIm7vDr3buWubgbk1H4ITkDxsmggaPwW2sXEycbCSog [203.0.113.2]: 500
The invalid MIME type is specified for the website.
- Connect to the server using RDP.
- Open Internet Information Services (IIS) > Sites > example.com > MIME Types > delete "." extension:
If the issue persists, follow the steps from the following article: Let's encrypt installation fails with 'Challenge marked as invalid' error