Hey CREIX ,
First of all, welcome to the Buttonizer Community 🚀
I've checked your website and was wondering if you were perhaps using a caching plugin? If so, can you try purging the cache of your site?
If that's not the case, can you let me know what version of Buttonizer you have installed and if you do see the buttons when you are signed into the admin?
Hope to hear from you soon 🙂