invalid object type in the field: “aggregateRating”

I have received an email from google search console that one of recipes has invalid object type in the field: “aggregateRating”

I do not know what does that mean, when I go to investigate the page:

This is what I’ve got:

{“@context”:”https:\/\/schema.org”,”@type”:”Recipe”,”name”:”Koktajl z arbuza i mi\u0119ty”,”url”:”https:\/\/smako-ksztalcenie.pl\/przepis\/koktajl-z-arbuza-i-miety\/”,”image”“https:\/\/smako-ksztalcenie.pl\/wp-content\/uploads\/2023\/07\/Koktajl-z-arbuza-i-miety-1-500×500.jpg”,”https:\/\/smako-ksztalcenie.pl\/wp-content\/uploads\/2023\/07\/Koktajl-z-arbuza-i-miety-1-500×375.jpg”,”https:\/\/smako-ksztalcenie.pl\/wp-content\/uploads\/2023\/07\/Koktajl-z-arbuza-i-miety-1-480×270.jpg”],”author”:{“@type”:”Person”,”name”:”Aneta Koszowska”},”datePublished”:”2023-07-13″,”description”:”Koktajl z arbuza i mi\u0119ty”,”prepTime”:”PT0H5M”,”cookTime”:”PT0H0M”,”totalTime”:”PT0H5M”,”recipeYield”:”1″,”recipeCategory”“Koktajle\/ Napoje”],”recipeCuisine”“Prosta i szybka”],”cookingMethod”“Bez gotowania”],”keywords”:”Dania wegetaria\u0144skie, Szybkie desery, Dania bogate w iwice, Dania bezglutenowe”,”recipeIngredient”“200 gram arbuza “,”2-3 sztuki listk\u00f3w \u015bwie\u017cej mi\u0119ty”,”150 mililitr\u00f3w wody zwyk\u0142ej lub gazowanej”,”2-3 sztuki kostek lodu”],”recipeInstructions”:[{“@type”:”HowToStep”,”name”:””,”text”:”Arbuza obierz ze sk\u00f3rki i oczy\u015b\u0107 z pestek.”,”image”:””},{“@type”:”HowToStep”,”name”:””,”text”:”Wszystkie sk\u0142adniki zblenduj. Je\u015bli u\u017cywasz kostek lodu to u\u017cyj mocnego blendera.”,”image”:””}],”aggregateRating”:0,”nutrition”:{“@type”:”NutritionInformation”,”calories”:”80 calories”,”carbohydrateContent”:”18 grams”,”cholesterolContent”:””,”fatContent”:”0.3 grams”,”fiberContent”:””,”proteinContent”:”1.6 grams”,”saturatedFatContent”:””,”servingSize”:”400 ml”,”sodiumContent”:””,”sugarContent”:””,”transFatContent”:””},”video”:[],”@id”:”https:\/\/smako-ksztalcenie.pl\/przepis\/koktajl-z-arbuza-i-miety\/#recipe”,”isPartOf”:{“@id”:”https:\/\/smako-ksztalcenie.pl\/przepis\/koktajl-z-arbuza-i-miety\/#webpage”},”mainEntityOfPage”:{“@type”:”WebPage”,”@id”:”https:\/\/smako-ksztalcenie.pl\/przepis\/koktajl-z-arbuza-i-miety\/#webpage”}}

When you search for aggregateRating, you will find it have 0 value:
“aggregateRating”:0

What does it mean ?

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