Oke thx, it is not possible for me to do the billing with my credit card , I first had to go to my bank for a bank scanner.. Brrrrr . . . . google with his things, (hate the platform) but anyway seems that I do'nt fixed this billing in a view days.
So I tryed it without a API key the way I does by many other sites. I set in the config TinyMCE the tekstfilter on ON and sandbox iframe OUT , what I read on forum from joomla.org it had to work now but still does'nt work
I found for me the solution to use Sourcerer from Regular Labs download url https://regularlabs.com/sourcerer/features used the free tool, works fine now !!