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That's weird that your Apache SSL settings would have any bearing on PHP and egress connections. Glad it works though, thanks for the update! Best guess is that maybe you were missing OpenSSL, and setting up Apache correctly got you the necessary libraries.

It appears adding TLS support properly in my Apache config worked. To those who are using a setup like mine: LAMP stack on CentOS 7 Used @Blesta.Store's tutorial (https://licensecart.com/brain/knowledgebase/398/How-to-install-Blesta-on-CentOS-without-a-panel.html) Let's Encrypt SSL Apache vHost (which you need anyway to use Let's Encrypt) Your Apache config file needs to look like so: <VirtualHost *:80> ServerAdmin email@yourdomain.com DocumentRoot "/var/www/html/yourdomain.com/" ServerName yourdomain.com ServerAlias www.yourdomain.com ErrorLog "/var/log/httpd/yourdomain.com-error_log" CustomLog "/var/log/httpd/yourdomain.com-access_log" combined <Directory "/var/www/html/yourdomain.com/"> DirectoryIndex index.html index.php Options Indexes MultiViews FollowSymLinks AllowOverride All Require all granted </Directory> Redirect permanent / httpd://yourdomain.com/ </VirtualHost> <VirtualHost *:443> ServerAdmin email@yourdomain.com DocumentRoot "/var/www/html/yourdomain.com/" ServerName yourdomain.com ServerAlias www.yourdomain.com ErrorLog "/var/log/httpd/yourdomain.com-error_log" CustomLog "/var/log/httpd/yourdomain.com-access_log" combined <If "%{HTTP_HOST} == 'www.yourdomain.com'"> Redirect permanent / https://yourdomain.com/ </If> <Directory "/var/www/html/yourdomain.com/"> DirectoryIndex index.html index.php Options Indexes MultiViews FollowSymLinks AllowOverride All Require all granted </Directory> SSLEngine On SSLProtocol -ALL +TLSv1.1 +TLSv1.2 SSLCertificateFile /etc/letsencrypt/live/yourdomain.com/cert.dh.pem SSLCertificateKeyFile /etc/letsencrypt/live/yourdomain.com/privkey.pem SSLCertificateChainFile /etc/letsencrypt/live/yourdomain.com/chain.pem </VirtualHost> SSLProtocol -ALL +TLSv1.1 +TLSv1.2 is what's vital in this situation I was having.