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An error occurred while attaching module (Dynamicweb.Frontend.Content)

System.NotSupportedException: The type for the given value is not supported by the 'In' operator. The supported type is 'System.Array'. Current: 'System.String'.
   at Dynamicweb.Indexing.Lucene.Helpers.ThrowTypeNotSupported(OperatorType operatorType, Type supportedType, Type currentType)
   at Dynamicweb.Indexing.Lucene.Helpers.ParseQueryExpressionInternal(IIndex index, Expression expression, Analyzer analyzer, QuerySettings settings)
   at Dynamicweb.Indexing.Lucene.Helpers.ParseQueryExpressionInternal(IIndex index, Expression expression, Analyzer analyzer, QuerySettings settings)
   at Dynamicweb.Indexing.Lucene.Helpers.ParseQueryExpression(IIndex index, Expression expression, QuerySettings settings)
   at Dynamicweb.Indexing.Lucene.LuceneIndexProvider.SearchInternal(IQuery query, QuerySettings settings)
   at Dynamicweb.Indexing.Querying.QueryService.Query(IQuery query, QuerySettings settings)
   at Dynamicweb.Ecommerce.Frontend.Frontend.GetProductsFromIndexQuery(ProductCatalogShowType settingsType)
   at Dynamicweb.Ecommerce.Frontend.Frontend.EcomRender()
   at Dynamicweb.Ecommerce.Frontend.Frontend.GetContent()
   at Dynamicweb.Frontend.Content.GetModuleOutput(Paragraph paragraph, PageView pageview)