A_niloo

So far I couldn’t find any plugin that best does what i need, but im sure if you search a bit you can find it, especially SEO Plugins they cover rich snippets too. but for now if you want to keep using this plugin, you need to edit it. find “all-in-one-schemaorg-rich-snippets/functions.php” then simply change the itemprop.
I’m not sure what you need to change but here is the link to learn about itemprop
https://schema.org/docs/search_results.html#q=itemprop
In my case i replaced itemprop=”reviewer” with itemprop=”author” , itemprop=”rating” with itemprop=”ratingValue” and itemprop=”dtreview” with itemprop=”datePublished”.
It’s also more efficient to have all these microdata at the top of the page rather than the bottom. My feeling is that it makes a difference in rankings, if you look at all the top ranking websites they all have their microdata at the top.

Yes, There is a problem, they are using wrong values in their coding, I just asked them to fix it, hope they do. Otherwise the plugin is useless. The codes they used for ratings and dates are not following the Schema.org standards. the problem is not your website.