keep getting post Response Logging: {“errors”:[{“message”:“Variable $productId of type ID! was provided invalid value”,“locations”:[{“line”:2,“column”:68}],“extensions”:{“value”:null,“problems”:[{“path”:,“explanation”:“Expected value to not be null”}]}},{“message”:“Variable $variants of type [ProductVariantsBulkInput!]! was provided invalid value”,“locations”:[{“line”:2,“column”:85}],“extensions”:{“value”:null,“problems”:[{“path”:,“explanation”:“Expected value to not be null”}]}}]} bookdelivered.myshopify.com error. Please help