Hi luka00 ,
First of all, welcome to the Buttonizer Community! 🥳
We are aware of the issues with the Facebook Messenger widget. Unfortunately, it seems like Facebook has changed the way how the messenger works and broke some functionality that Buttonizer was using.
We've reached out to Facebook and hopefully they'll fix the issue. If the issue has been resolved, we'll update this topic 🙂
If there's anything else we can help you with, let me know!