My code is correct. It worked for a long time already. It just dissapears off and on.
I have different possibilities in VC.
1. Insert a raw html: [contact-form-7 id=”1676″ title=”Kontaktformular 1″]
2. There are also pre-defined Elements in VC. In this case I choose the “Contact form 7”. This Element has a dopdown menu and I can choose my form “kontaktformular 1”. It always worked, but suddenly it just shows [contact-form-7 404 “Not Found”] on my site.