Plesk is working in conjunction with WHMCS.
On attempt to start auto-update in WHMCS > Update Now > Check Now the following error occurs:
CONFIG_TEXT: Unable to download remote lts.json from url: https://releases.whmcs.com/lts.json Message cURL error 77: error setting certificate verify locations: CAfile: C:\Program Files (x86)\Plesk\Additional\PHPSettings\cacert.pem CApath: none
PHP cURL is not using an updated set of root certificates to verify server certificates.
- Connect to RDP;
- Download the
cacert.pemfile from the main curl website http://curl.haxx.se/ca/cacert.pem;
- Put the file to the folder: %plesk_dir%\Additional\PHPSettings.
Additional information can be found in the Plesk KB article Websites are unable to make php curl requests to SSL sites.