- Cannot issue DigiCert certificate under Plesk > Domains > example.com > DigiСert SSL > Basic SSL > Activate now:
PLESK_ERROR: Something went wrong with your order. Please double check configuration parameters.File authentication failed. File not found
- The option Permanent SEO-safe 301 redirect from HTTP to HTTPS is disabled under Plesk > Domains > example.com > Hosting Settings;
- www and non-www domains exist: www.example.com and example.com;
- There is no A record for example.com
# dig example.com
DigiCert verifies both www and non-www domain's name and fails if one of them could not be resolved.
Set up correctly name resolution for non-www example.com site, so that its IP will be resolved properly.