I have very little experience with vast but I need to learn fast. Right now I'm writing a vast file that will do a waterfall between several vast urls. Now it's the beginning so I put only one partner tag.
But when I test it in the google vast inspector, it fails:
AdError 1010: The ad response was not understood and cannot be parsed.
I checked several examples on the web like this one in order to reproduce it, I don't understand what I did wrong. Can you help me please ?
Thank you so much !