Google is telling me - Invalid object type for field 'itemReviewed'

[Sunny17]

I am running Google advertisement and all of a sudden I got an email from Google Search Console team telling me that for a product I am having for ages that there is an issue with the review snippet.

I cannot figure out how to fix it, any ideas?

Cheers,

Dagmar

[voicestraw]

Experiencing the same issue.

[YoolaDesign]

me too. no one knows how to fix this ?