I have the same problem on a version 1.89 / Maybe author of plugin can change micro data to
{
"@context": "https://schema.org/",
"@type": "CreativeWorkSeries",
"name": "[title]",
"aggregateRating": {
"@type": "AggregateRating",
"ratingValue": "[score]",
"bestRating": "[best]",
"ratingCount": "[count]"
}
}