Error on blank/null note on intellij startup

[iesanme]

java.lang.NullPointerException
at com.mladich.lastactionnote.tools.FileHistory.addToHistory(FIleHistory.kt:25)
at com.mladich.lastactionnote.listeners.FileListener$fileOpened$documentListener$1.documentChanged(ProjectListeners.kt:94)
at com.intellij.openapi.editor.impl.DocumentImpl.lambda$changedUpdate$1(DocumentImpl.java:913)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeNonCancelableSection$3(CoreProgressManager.java:222)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:679)
at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:635)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$computeInNonCancelableSection$4(CoreProgressManager.java:230)
at com.intellij.openapi.progress.Cancellation.computeInNonCancelableSection(Cancellation.java:64)
at com.intellij.openapi.progress.impl.CoreProgressManager.computeInNonCancelableSection(CoreProgressManager.java:230)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeNonCancelableSection(CoreProgressManager.java:221)
at com.intellij.openapi.editor.impl.DocumentImpl.changedUpdate(DocumentImpl.java:910)
at com.intellij.openapi.editor.impl.DocumentImpl.updateText(DocumentImpl.java:814)
at com.intellij.openapi.editor.impl.DocumentImpl.deleteString(DocumentImpl.java:570)
at com.intellij.openapi.editor.actions.BackspaceAction.doBackSpaceAtCaret(BackspaceAction.java:76)
at com.intellij.openapi.editor.actions.BackspaceAction$Handler.executeWriteAction(BackspaceAction.java:32)
at com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler$1.run(EditorWriteActionHandler.java:56)
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:992)
at com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler.doExecute(EditorWriteActionHandler.java:70)
at com.intellij.openapi.editor.actionSystem.EditorActionHandler.execute(EditorActionHandler.java:202)
at com.intellij.codeInsight.editorActions.BackspaceHandler.handleBackspace(BackspaceHandler.java:91)
at com.intellij.codeInsight.editorActions.BackspaceHandler.executeWriteAction(BackspaceHandler.java:47)
at com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler$1.run(EditorWriteActionHandler.java:56)
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:992)
at com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler.doExecute(EditorWriteActionHandler.java:70)
at com.intellij.openapi.editor.actionSystem.EditorActionHandler.lambda$execute$2(EditorActionHandler.java:192)
at com.intellij.openapi.editor.actionSystem.EditorActionHandler.doIfEnabled(EditorActionHandler.java:89)
at com.intellij.openapi.editor.actionSystem.EditorActionHandler.lambda$execute$3(EditorActionHandler.java:191)
at com.intellij.openapi.editor.impl.CaretModelImpl.lambda$runForEachCaret$3(CaretModelImpl.java:310)
at com.intellij.openapi.editor.impl.CaretModelImpl.doWithCaretMerging(CaretModelImpl.java:419)
at com.intellij.openapi.editor.impl.CaretModelImpl.runForEachCaret(CaretModelImpl.java:319)
at com.intellij.openapi.editor.impl.CaretModelImpl.runForEachCaret(CaretModelImpl.java:296)
at com.intellij.openapi.editor.actionSystem.EditorActionHandler.execute(EditorActionHandler.java:189)
at com.intellij.openapi.editor.actions.DeleteSelectionHandler.executeWriteAction(DeleteSelectionHandler.java:47)
at com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler$1.run(EditorWriteActionHandler.java:56)
at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:992)
at com.intellij.openapi.editor.actionSystem.EditorWriteActionHandler.doExecute(EditorWriteActionHandler.java:70)
at com.intellij.openapi.editor.actionSystem.EditorActionHandler.lambda$execute$4(EditorActionHandler.java:199)
at com.intellij.openapi.editor.actionSystem.EditorActionHandler.doIfEnabled(EditorActionHandler.java:89)
at com.intellij.openapi.editor.actionSystem.EditorActionHandler.execute(EditorActionHandler.java:198)
at com.intellij.codeInsight.lookup.impl.BackspaceHandler.doExecute(BackspaceHandler.java:25)
at com.intellij.openapi.editor.actionSystem.DynamicEditorActionHandler.doExecute(DynamicEditorActionHandler.java:63)
at com.intellij.openapi.editor.actionSystem.EditorActionHandler.lambda$execute$4(EditorActionHandler.java:199)
at com.intellij.openapi.editor.actionSystem.EditorActionHandler.doIfEnabled(EditorActionHandler.java:89)
at com.intellij.openapi.editor.actionSystem.EditorActionHandler.execute(EditorActionHandler.java:198)
at com.intellij.openapi.editor.actionSystem.EditorAction.lambda$actionPerformed$0(EditorAction.java:93)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:219)
at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:174)
at com.intellij.openapi.editor.actionSystem.EditorAction.actionPerformed(EditorAction.java:102)
at com.intellij.openapi.editor.actionSystem.EditorAction.actionPerformed(EditorAction.java:77)
at com.intellij.openapi.actionSystem.ex.ActionUtil.doPerformActionOrShowPopup(ActionUtil.java:339)
at com.intellij.openapi.keymap.impl.ActionProcessor.performAction(ActionProcessor.java:47)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher$myActionProcessor$1.performAction(IdeKeyEventDispatcher.kt:502)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcherKt.doPerformActionInner$lambda$5$lambda$4(IdeKeyEventDispatcher.kt:865)
at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:105)
at com.intellij.openapi.application.TransactionGuardImpl.performUserActivity(TransactionGuardImpl.java:94)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcherKt.doPerformActionInner$lambda$5(IdeKeyEventDispatcher.kt:865)
at com.intellij.openapi.actionSystem.ex.ActionUtil.performDumbAwareWithCallbacks(ActionUtil.java:362)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcherKt.doPerformActionInner(IdeKeyEventDispatcher.kt:863)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcherKt.access$doPerformActionInner(IdeKeyEventDispatcher.kt:1)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processAction$intellij_platform_ide_impl(IdeKeyEventDispatcher.kt:587)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processAction(IdeKeyEventDispatcher.kt:513)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processActionOrWaitSecondStroke(IdeKeyEventDispatcher.kt:454)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.inInitState(IdeKeyEventDispatcher.kt:447)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.dispatchKeyEvent(IdeKeyEventDispatcher.kt:309)
at com.intellij.ide.IdeEventQueue.dispatchKeyEvent(IdeEventQueue.kt:617)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.kt:587)
at com.intellij.ide.IdeEventQueue.access$_dispatchEvent(IdeEventQueue.kt:67)
at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1$1.compute(IdeEventQueue.kt:369)
at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1$1.compute(IdeEventQueue.kt:368)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:787)
at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1.invoke(IdeEventQueue.kt:368)
at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1.invoke(IdeEventQueue.kt:363)
at com.intellij.ide.IdeEventQueueKt.performActivity$lambda$1(IdeEventQueue.kt:992)
at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:113)
at com.intellij.ide.IdeEventQueueKt.performActivity(IdeEventQueue.kt:992)
at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$7(IdeEventQueue.kt:363)
at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:861)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.kt:405)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:92)