@emma24
Thank you for your fast reply and for the investigation.
I forgot to reply myself. But I was able to fix it by myself, but I don’t know if it’s a global error or if it was just me.
So go to wp-content/plugins/simple-social-buttons/assets/js
-> front.js
line 105
Changed $(window).load(function () {
to
$(window).on(function () {
That fixed the error.