Google webmaster tools - structured data

[Bombardier]

In my GWT console I get an error stating "Missing best or worst rating" in structured data test
Any ideas how to correct this ?

 

[Bob]

Pretty sure its a BUG on googles end (from what I've read). Showcase uses the Core XenForo 'rating' template and the output is the same exact syntax as the Core XF Resource Manager and Core XF Media Gallery (I do this so that it is standardized). If you run a xenforo.com resource URL through the validater, you will see the same errors.

Is it the same issue as this? Not a Bug - Google Search Console: Review-aggregate problem