Hello, Pites,
These are just warnings, not any critical errors, so you don’t need to worry about them.
If you don’t have any reviews yet, that will show up as a warning in the Schema testing tool. That’s because Google will actually look out for those fields. Hence we recommend you spend some time asking happy customers to leave a review/rating to get rid of the “aggregateRating” and “review” warnings.
Kind regards,
8theme team