Lester Chan on "[Plugin: WP-PostRatings] Structured data testing tool errors"

Hi, I have some issues with the structured data markup on my posts.
Please have a look on the screenshoot:
Structured Data errors

It is from this post:
SEO Comfort Level

I have the same problem on all my sites when I use wp post ratings plugin.
WP-Theme: Avada and Karma

Thank you very much for support.
Have a nice day.

https://wordpress.org/plugins/wp-postratings/

Sorry I got no solution for yours. Because it can be a ton of combination with your theme, plugin and the way you put content to the editor.

I would recommend deactivate all plugins and switched to the default theme to see if it works in the first place.