In Komento v3.0.5 you are using the Schema.org values ratingValue & reviewCount. However you wrote them as ratingvalue & reviewcount which is reported as an error in the yandex test engine:

aggregaterating

aggregaterating
ERROR: Field ratingvalue not determined in specification http://schema.org/AggregateRating. Perhaps you mean ratingValue
ERROR: Field reviewcount not determined in specification http://schema.org/AggregateRating. Perhaps you mean reviewCount
itemType = http://schema.org/AggregateRating
ratingvalue = 0
reviewcount = 0

Can you please fix that in the next version?

thanks