FTLucene.LuceneIndexer - Failed System.NullReferenceException: Object reference not set to an instance of an object. (4370542)

FTLucene.LuceneIndexer - Failed
System.NullReferenceException: Object reference not set to an instance of an object.

2023-02-20 12:11:29,921 [5709] ERROR FTLucene.WriterCache - MBX:3541 Location:1
System.IO.IOException: read past EOF
at Lucene.Net.Store.BufferedIndexInput.Refill()
at Lucene.Net.Store.BufferedIndexInput.ReadByte()
at Lucene.Net.Store.ChecksumIndexInput.ReadByte()
at Lucene.Net.Store.IndexInput.ReadInt()
at Lucene.Net.Index.SegmentInfos.Read(Directory directory, String segmentFileName)
at Lucene.Net.Index.IndexFileDeleter..ctor(Directory directory, IndexDeletionPolicy policy, SegmentInfos segmentInfos, StreamWriter infoStream, DocumentsWriter docWriter, HashSet`1 synced)
at Lucene.Net.Index.IndexWriter.Init(Directory d, Analyzer a, Boolean create, IndexDeletionPolicy deletionPolicy, Int32 maxFieldLength, IndexingChain indexingChain, IndexCommit commit)
at Lucene.Net.Index.IndexWriter..ctor(Directory d, Analyzer a, Boolean create, MaxFieldLength mfl)
at FTLucene.WriterCache.OpenWriter(String indexpath)
at FTLucene.WriterCache.GetIdxWriter(IndexingMsg msg)
2023-02-20 12:11:29,922 [5709] ERROR FTLucene.LuceneIndexer - Failed
System.NullReferenceException: Object reference not set to an instance of an object.