“Division by zero” error for first review

Hi,

I’m getting an error after adding the first ever review for a product – via the product detail page, not via the review form: https://drive.google.com/file/d/1qxE5Xrpdm8bmuHt6dp3rf93gAmG4ykbd/view?usp=sharing
The reviews are configured to be ‘unapproved’ by default.
When I disable the histogram table, the error doesn’t appear.

Best regards,

michael