Various Plesk operations fail: error setting certificate verify locations: CApath: none

Pablo Alvarez

Updated November 20, 2024 14:58

Plesk for Windows Plesk for Linux kb: technical ABT: Group A

Applicable to:

An error like these appears in the extensions catalog, backup scheduler, during Plesk updates, or while running the Daily Maintenance task

error setting certificate verify locations: CAfile: C:\Program Files (x86)\Plesk\admin\conf\cacert.pem CApath: none

Internal server error
Installing WordPress using the Applications menu fails

Error: The following error has occurred during the download of application:
HTTP Error (0) https://cdn.apscatalog.plesk.com/all-app/WordPress.org/WordPress/5.2.1-273.aps?packager=Plesk

Sharing Violation

The errors above may cause these symptoms

WordPress packages that are 0 size in %plesk_dir%var\modules\wp-toolkit\packages
Domain log files larger than the log rotation limit

The CA certificate, cacert.pem, is corrupted or missing, which prevents connections from being established.

Download and install the missing file.

Windows

Connect to the server over RDP
Download cacert.pem from the cURL website: http://curl.haxx.se/ca/cacert.pem
Place the file inside %plesk_dir%admin\conf.
Make sure that these directives in %plesk_dir%admin\conf\php.ini have the right path to cacert.pem

curl.cainfo="C:\Program Files (x86)\Plesk\admin\conf\cacert.pem"
openssl.cafile="C:\Program Files (x86)\Plesk\admin\conf\cacert.pem"

Linux

Connect to the server over SSH
Run this command to download and install the CA certificate from the official cURL website

# wget https://curl.haxx.se/ca/cacert.pem && mv cacert.pem /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem