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

System.IO.FileNotFoundException: Could not find file 'C:\inetpub\wwwroot\AllMedia\Development\Files\System\Indexes\ProductAssets\Articles\ArticlesA\segments_7eq'.
File name: 'C:\inetpub\wwwroot\AllMedia\Development\Files\System\Indexes\ProductAssets\Articles\ArticlesA\segments_7eq'
   at Lucene.Net.Index.SegmentInfos.FindSegmentsFile.Run(IndexCommit commit)
   at Lucene.Net.Index.DirectoryReader.Open(Directory directory, IndexDeletionPolicy deletionPolicy, IndexCommit commit, Boolean readOnly, Int32 termInfosIndexDivisor)
   at Dynamicweb.Indexing.Lucene.LuceneIndexProvider.get_Reader()
   at Dynamicweb.Indexing.Lucene.LuceneIndexProvider.SearchInternal(IQuery query, QuerySettings settings)
   at Dynamicweb.Indexing.Querying.QueryService.Query(IQuery query, QuerySettings settings)
   at Dynamicweb.QueryPublisher.Frontend.GetContent()
   at Dynamicweb.Frontend.Content.GetModuleOutput(Paragraph paragraph, PageView pageview)