Thank you @seraph0x

There is a problem with your ssl certificate, making cloudflare not sent critical parts of the system.

Example, if you go here: https://milovana.com/webteases/showtease.php?id=19919

It never gets to the start screen. If you look at the network tools in browser, you will see this:

https://imgur ...

Now that "flashtease" is actually HTML5. Is there a new editor for them?