- Plesk Onyx
- The following error occurs on an attempt to install Let's Encrypt certificate on a domain:
PLESK_ERROR: Error: Let's Encrypt SSL certificate installation failed: Challenge marked as invalid. Details: Could not connect to example.com
- No misconfiguration according to the following article:
Unable to install Let's Encrypt certificate: Challenge marked as invalid
- Ubmraco CMS is used on the domain.
- The following line is presented in web.config file:
<add key="umbracoReservedPaths" value="~/umbraco,~/install/" />
Umbraco CMS specific, all requests are handled on CMS side.
Go to Plesk > Domains > example.com > File Manager and open
\httpdocs\web.config for editing replacing the string listed above to one that below (refer to Umbraco documentation for more info):
<add key="umbracoReservedPaths" value="~/umbraco,~/install/ ,~/.well-known" />
Or do the same while being connected via RDP and editing