Thank you @iova.mihai. I noticed it is working now when adding the https://
But jhow can I add extra information to the form, that https need to be included? It is not clear at all to the customers, and we received several complaints that the form is not working. I think it would be good ux if you accept www-versions as well.
We also asked for first name and surname in the form beforehand but now I noticed it disappeared from the form while I tried to solve this. How can I add them to the form?