Zapier Publishing via Sheets


i am having huge problems with zapier returning this message:
The app returned “ValidationError: Validation Failure”.

i got it working earlier by removing the multi reference fields in my collection,
but shouldnt this be possible?

how do you guys paste multiple pictures or references? i have tried with semi colon in many ways, but cant get the zap going. I also wonder if someone can teach me how i can troubleshoot my zap correctly with postman/API so that i can see where the fault is?

Here is my site Read-Only: LINK
(how to share your site Read-Only link)