If the automatic SSL installer in cPanel proves ineffective, it is advisable to utilize the free version of LetsEncrypt. To install it, connect to your SSH server and execute the following commands:

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# /scripts/install_lets_encrypt_autossl_provider

# echo 'https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf' >> /root/.cpanel/letsencrypt_tos_cache

After the installation, the setup guide will be automatically displayed. To configure it, access WHM and proceed to the Manage AutoSSL section. Choose the Let’s Encrypt option, approve the rules, and save the settings.