@Paul thanks for your response.
@Licensecart a huge thanks to him for helping me resolve this issue over Skype and Teamviewer. It's great having a guy like him with such a great knowledge of Blesta just 'down the road'.
It was CloudFlare RocketLoader that was causing the issue, I felt so stupid but it was just simply overlooked. Super happy to have things up and running again, this topic can be marked as resolved.