Not able to test plugin after upgrading to 2021.2, not working

I had created a plugin using earlier version of Intellij IDEA, i updated to 2021.2.

After making changes to plugin, I was trying to run the plugin. I was able to see IDE, but then my plugin was not displaying.

I see following stack trace, instead.

Stack Trace:

java.lang.Throwable: toolbar creation trace
at com.intellij.openapi.actionSystem.impl.ActionToolbarImpl.<init>(ActionToolbarImpl.java:112)
at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.createActionToolbar(ActionManagerImpl.java:432)
at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.createActionToolbar(ActionManagerImpl.java:426)
at com.android.tools.idea.common.error.IssuePanel.createToolbar(IssuePanel.java:244)
at com.android.tools.idea.common.error.IssuePanel.createTitlePanel(IssuePanel.java:255)
at com.android.tools.idea.common.error.IssuePanel.<init>(IssuePanel.java:124)
at com.android.tools.idea.common.surface.DesignSurface.<init>(DesignSurface.java:328)
at com.android.tools.idea.uibuilder.surface.NlDesignSurface.<init>(NlDesignSurface.java:398)
at com.android.tools.idea.uibuilder.surface.NlDesignSurface$Builder.build(NlDesignSurface.java:327)
at com.android.tools.idea.uibuilder.visual.VisualizationForm.<init>(VisualizationForm.java:151)
at com.android.tools.idea.uibuilder.visual.VisualizationManager.createPreviewForm(VisualizationManager.java:118)
at com.android.tools.idea.uibuilder.visual.VisualizationManager.initToolWindow(VisualizationManager.java:125)
at com.android.tools.idea.uibuilder.visual.VisualizationManager$2.run(VisualizationManager.java:268)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:333)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:323)
at com.intellij.util.ui.update.MergingUpdateQueue.lambda$flush$1(MergingUpdateQueue.java:273)
at com.intellij.util.ui.EdtInvocationManager.invokeAndWaitIfNeeded(EdtInvocationManager.java:148)
at com.intellij.util.ui.UIUtil.invokeAndWaitIfNeeded(UIUtil.java:2199)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:284)
at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:242)
at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:240)
at com.intellij.util.Alarm$Request.runSafely(Alarm.java:391)
at com.intellij.util.Alarm$Request.run(Alarm.java:377)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at com.intellij.util.concurrency.SchedulingWrapper$MyScheduledFutureTask.run(SchedulingWrapper.java:220)
at com.intellij.openapi.application.TransactionGuardImpl.runWithWritingAllowed(TransactionGuardImpl.java:214)
at com.intellij.openapi.application.TransactionGuardImpl.access$200(TransactionGuardImpl.java:21)
at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:196)
at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:794)
at com.intellij.openapi.application.impl.ApplicationImpl.lambda$invokeLater$4(ApplicationImpl.java:350)
at com.intellij.openapi.application.impl.FlushQueue.doRun(FlushQueue.java:84)
at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:133)
at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:46)
at com.intellij.openapi.application.impl.FlushQueue$FlushNow.run(FlushQueue.java:189)
at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:776)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:746)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:886)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:755)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$7(IdeEventQueue.java:442)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:825)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:441)
at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:794)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:487)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

I also created new plugin with basic plugin, from the below

https://github.com/JetBrains/intellij-sdk-code-samples/tree/main/kotlin_demo

Still i was able  see the same err in trace