A required field is missing

Hello,

Microdata is not part of the pixel.

You probably try to upload products into a Product Catalog using the pixel. I recommend to do it by using a feed instead, is much more flexible and proved more reliable.

However, if you do need Microdata, you’ll need to add the required fields with a dedicated plugin. We have one on our website, but it’s a paid product: https://www.pixelyoursite.com/plugins/smart-opengraph

I suppose there are other free as well, so you can do a search for it.