meta tags not showing up in fb-messenger&discord ect... -> when using https

So I recently updated my server from ubuntu 16.04 to 18.04 (full reinstall)

Now I'm having the following issue:
When using https no site will embed images or meta tags

https://i.imgur.com/ILFYZ0b^ same problem with facebook-messenger

Here is my /etc/apache2/sites-enabled/000-default.conf

<VirtualHost *:80>    ServerAdmin ---    ServerName melijn.com    ServerAlias www.melijn.com    DocumentRoot /var/www/html    ErrorLog ${APACHE_LOG_DIR}/error.log    CustomLog ${APACHE_LOG_DIR}/access.log combined</VirtualHost><VirtualHost *:443>    ServerName melijn.com    ServerAlias www.melijn.com    ServerAdmin admin@melijn.com    DocumentRoot /var/www/html    ErrorLog ${APACHE_LOG_DIR}/ssl-error.log    CustomLog ${APACHE_LOG_DIR}/ssl-acces.log combined    SSLEngine on    SSLCertificateFile /home/merijn/Certs/melijn.com.crt    SSLCertificateKeyFile /home/merijn/Certs/melijn.com.key</VirtualHost>

You can visit the sites fine btw:
https://melijn.com
http://melijn.com
I hope there is a solution :)