Review snippets issues detected on

Hi,

I am hoping to get some help. I just installed this plug in a few days ago and then I received a few issue alert email from Google.

_____first email_______
Products issues detected on thecolombiancoffeeco.com.au

To the owner of thecolombiancoffeeco.com.au:

Search Console has identified that your site is affected by 3 Products issues:

Top Errors

Errors can prevent your page or feature from appearing in Search results. The following errors were found on your site:

Rating value is out of range

Value in property “reviewCount” must be positive

Top Warnings

Warnings are suggestions for improvement. Some warnings can affect your appearance on Search; some might be reclassified as errors in the future. The following warnings were found on your site:

Missing field “review”

We recommend that you fix these issues when possible to enable the best experience and coverage in Google Search.
_________second email___________

Review snippets issues detected on thecolombiancoffeeco.com.au

To the owner of thecolombiancoffeeco.com.au:

Search Console has identified that your site is affected by 2 Review snippets issues:

Top Errors

Errors can prevent your page or feature from appearing in Search results. The following errors were found on your site:

Value in property “reviewCount” must be positive

Rating value is out of range

We recommend that you fix these issues when possible to enable the best experience and coverage in Google Search.
______________
Could anyone help me how to fix these issues please?
Thank you.

The page I need help with: [log in to see the link]