After installation getting error while showing autocompletion

[vyasakshay]

Have installed the extension. Code autocompletion, code actions show this error
java.lang.NullPointerException: Cannot invoke "java.lang.Process.getInputStream()" because "this.process" is null

[akurtakov]

Can you please share the whole stacktrace ?

[d7d6]

!ENTRY org.eclipse.lsp4e 4 0 2023-09-03 14:43:32.316
!MESSAGE java.lang.NullPointerException: Cannot invoke "java.lang.Process.getInputStream()" because "this.process" is null
!STACK 0
java.util.concurrent.ExecutionException: java.lang.NullPointerException: Cannot invoke "java.lang.Process.getInputStream()" because "this.process" is null
at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:396)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2096)
at org.eclipse.lsp4e.operations.completion.LSContentAssistProcessor.getFuture(LSContentAssistProcessor.java:305)
at org.eclipse.lsp4e.operations.completion.LSContentAssistProcessor.getContextInformationAutoActivationCharacters(LSContentAssistProcessor.java:348)
at org.eclipse.jface.text.contentassist.IContentAssistProcessorExtension$1.isContextInformationAutoActivation(IContentAssistProcessorExtension.java:128)
at org.eclipse.jface.text.contentassist.ContentAssistant.getAutoActivationTriggerType(ContentAssistant.java:1252)
at org.eclipse.jface.text.contentassist.ContentAssistant$AutoAssistListener.keyPressed(ContentAssistant.java:346)
at org.eclipse.jface.text.contentassist.ContentAssistant$AutoAssistListener.verifyKey(ContentAssistant.java:375)
at org.eclipse.jface.text.TextViewer$VerifyKeyListenersManager.verifyKey(TextViewer.java:480)
at org.eclipse.swt.custom.StyledTextListener.handleEvent(StyledTextListener.java:70)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4274)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1066)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1090)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1075)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:778)
at org.eclipse.swt.custom.StyledText.handleKeyDown(StyledText.java:5742)
at org.eclipse.swt.custom.StyledText.lambda$28(StyledText.java:5426)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:89)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4274)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1066)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1090)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1075)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1117)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1113)
at org.eclipse.swt.widgets.Widget.wmKeyDown(Widget.java:1840)
at org.eclipse.swt.widgets.Control.WM_KEYDOWN(Control.java:5153)
at org.eclipse.swt.widgets.Canvas.WM_KEYDOWN(Canvas.java:406)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4776)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:340)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:5040)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(Native Method)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3658)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1155)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:342)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1046)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:645)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:342)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:552)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:171)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:152)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:136)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:402)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:651)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:588)
at org.eclipse.equinox.launcher.Main.run(Main.java:1459)
Caused by: java.lang.NullPointerException: Cannot invoke "java.lang.Process.getInputStream()" because "this.process" is null
at org.eclipse.acute.OmnisharpStreamConnectionProvider.getInputStream(OmnisharpStreamConnectionProvider.java:171)
at org.eclipse.lsp4e.LanguageServerWrapper.lambda$1(LanguageServerWrapper.java:295)
at java.base/java.util.concurrent.CompletableFuture$UniRun.tryFire(CompletableFuture.java:787)
at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510)
at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1773)
at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.exec(CompletableFuture.java:1760)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:387)
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1312)
at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1843)
at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1808)
at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:188)