Got exactly the same problem I guess, but am unable to solve it myself. Can't find the plugin YT framework 2.1.1. on the web no more, and seem unable to solve this one.

Dear developers, please help!

Dear Marlies Schijven,

Could you please send your site account to us? We will check directly.
For the security reason, please enter your site account in
Require Help
From Staff + Mod/Admin?

Thanks!

It is resolved now! ! Indeed, it appeared to be a cache and cookies problem. I deleted my Chrome cookies and cache - and it comes up ok now (for others experiencing the same issue: checking your site in a 'privite browser, ctrl-shift-n combination in chrome, is also a great way to check).

What an awesome service you provide even for free templates!
This convinced me to take a subscription to your extensions as well (since I am very happy with this free template I do not need a template subscription!). Thank you very much - much recommended.!!!!