Jetpack form not displayed

Hi,

I’ve made a form with Jetpack. Unfortunately, it isn’t (always) displayed.
Sometimes it does appear on this page, sometimes there is only a link that says ‘Een formulier indienen’ (in English: Submit a form). When you click on it, the page opens again.
On other pages, my form work perfect. Only this page and another page (https://www.viaperspectief.nl/over_viaperspectief/offerte_incompany_scholing/) I experience this error

The page I need help with: [log in to see the link]