Man you’re absolutely fantastic! Thanks for the help, it works now! 
Ok, found the solution this issue “phpmyadmin → page not found”
Will WORK via domain name. (http://cp.mydomain.com/phpmyadmin)
Will NOT work via IP address (https://44.207.26.254/phpmyadmin)
Unrelated question (asked before)
What is the easiest way to hide public access to phpmyadmin?
Remove /etc/apache2/conf.d/phpmyadmin.inc
And create a own template to include the config in phpmyadmin.inc
If you use nginx the file is located in /etc/nginx/conf.d/phpmyadmin.inc
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Perfect, thank you