NPE in OpenSelectionIntentions_Action

[fac2003]

Trying to use grammar cells in new project. Installed these plugins:

plugin "com.mbeddr.mpsutil.common" plugin "de.slisson.mps.hacks" . plugin "de.slisson.mps.richtext" plugin "de.slisson.mps.editor.multiline" plugin "de.itemis.mps.selection" plugin "de.itemis.mps.celllayout"

Got an exception a while later when working on something unrelated to grammar cells or mbeddr:

User's action doUpdate method failed. Action: Open Selection Intentions. Class: de.itemis.mps.selection.runtime.plugin.OpenSelectionIntentions_Action

java.lang.NullPointerException at de.itemis.mps.selection.runtime.intentions.SelectionIntentionsManager.getApplicableIntentions(SelectionIntentionsManager.java:112) at de.itemis.mps.selection.runtime.plugin.OpenSelectionIntentions_Action.isApplicable(OpenSelectionIntentions_Action.java:32) at de.itemis.mps.selection.runtime.plugin.OpenSelectionIntentions_Action.doUpdate(OpenSelectionIntentions_Action.java:36) at jetbrains.mps.workbench.action.BaseAction$1.run(BaseAction.java:130) at jetbrains.mps.smodel.WorkbenchModelAccess.lambda$runReadAction$0(WorkbenchModelAccess.java:77) at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:925) at jetbrains.mps.smodel.WorkbenchModelAccess.runReadAction(WorkbenchModelAccess.java:74) at jetbrains.mps.smodel.ModelAccessBase.runReadAction(ModelAccessBase.java:53) at jetbrains.mps.workbench.action.BaseAction.update(BaseAction.java:121) at com.intellij.openapi.actionSystem.AnAction.beforeActionPerformedUpdate(AnAction.java:232) at com.intellij.openapi.actionSystem.ex.ActionUtil.performDumbAwareUpdate(ActionUtil.java:133) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processAction(IdeKeyEventDispatcher.java:643) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processActionOrWaitSecondStroke(IdeKeyEventDispatcher.java:520) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.inInitState(IdeKeyEventDispatcher.java:475) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.dispatchKeyEvent(IdeKeyEventDispatcher.java:212) at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:697) at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:382) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)