From our Google Console, we note that there are 6 product pages with error mentioning that "Either "offers", "review", or "aggregateRating" should be specified". May I know how to fix this? Please advise, thanks!
That means structured data on your product pages is missing some properties, according to Google.
Look through your theme files for scripts like this:
I notice two of these scripts on the pages you mentioned. One defining your Organization. The other defining the product. Additionally there is some html defining the aggregateRating using html attributes itemscope, itemprop, etc.
Check your pages using Google's structured data testing tool:
It looks like you fixed the issue at hand. Did you? At least, "offers" is listed correctly in the product schema data. Does Search Console still list the errors?