java.lang.NullPointerException: Cannot invoke "org.apache.lucene.index.IndexWriter.getReader(boolean, boolean)" because "<parameter1>" is null
	at org.apache.lucene.core@9.9.1/org.apache.lucene.index.DirectoryReader.open(Unknown Source)
	at org.apache.lucene.core@9.9.1/org.apache.lucene.index.DirectoryReader.open(Unknown Source)
	at org.jabref@5.13.48/org.jabref.logic.pdf.search.PdfIndexer.initializeIndexWriterAndReader(Unknown Source)
	at org.jabref@5.13.48/org.jabref.logic.pdf.search.PdfIndexer.getIndexWriter(Unknown Source)
	at org.jabref@5.13.48/org.jabref.logic.pdf.search.PdfIndexer.getListOfFilePaths(Unknown Source)
	at org.jabref@5.13.48/org.jabref.logic.pdf.search.IndexingTaskManager.updateIndex(Unknown Source)
	at org.jabref@5.13.48/org.jabref.gui.LibraryTab.onDatabaseLoadingSucceed(Unknown Source)
	at org.jabref@5.13.48/org.jabref.gui.util.DefaultTaskExecutor.lambda$getJavaFXTask$4(Unknown Source)
	at org.jabref.merged.module@5.13.48/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
	at org.jabref.merged.module@5.13.48/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
	at org.jabref.merged.module@5.13.48/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
	at org.jabref.merged.module@5.13.48/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
	at org.jabref.merged.module@5.13.48/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
	at org.jabref.merged.module@5.13.48/com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
	at org.jabref.merged.module@5.13.48/com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
	at org.jabref.merged.module@5.13.48/javafx.event.Event.fireEvent(Unknown Source)
	at org.jabref.merged.module@5.13.48/javafx.concurrent.EventHelper.fireEvent(Unknown Source)
	at org.jabref.merged.module@5.13.48/javafx.concurrent.Task.fireEvent(Unknown Source)
	at org.jabref.merged.module@5.13.48/javafx.concurrent.Task.setState(Unknown Source)
	at org.jabref.merged.module@5.13.48/javafx.concurrent.Task$TaskCallable.lambda$call$1(Unknown Source)
	at org.jabref.merged.module@5.13.48/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(Unknown Source)
	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
	at org.jabref.merged.module@5.13.48/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(Unknown Source)
	at org.jabref.merged.module@5.13.48/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
	at org.jabref.merged.module@5.13.48/com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
	at org.jabref.merged.module@5.13.48/com.sun.glass.ui.gtk.GtkApplication.lambda$runLoop$11(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)