fix(bugs): enhancements and bug fixes - more (#4043)

extensions/cornerstone/src/services/ColorbarService/ColorbarService.ts

@@ -75,10 +75,7 @@ export default class ColorbarService extends PubSubService {
 
     displaySetInstanceUIDs.forEach((displaySetInstanceUID, index) => {
       const actorEntry = actorEntries.find(entry => entry.uid.includes(displaySetInstanceUID));
-      if (!actorEntry) {
-        return;
-      }
-      const { uid: volumeId } = actorEntry;
+      const volumeId = actorEntry?.uid;
       const properties = viewport?.getProperties(volumeId);
       const colormap = properties?.colormap;
       // if there's an initial colormap set, and no colormap on the viewport, set it
@@ -194,8 +191,10 @@ export default class ColorbarService extends PubSubService {
   private setViewportColormap(viewportId, displaySetInstanceUID, colormap, immediate = false) {
     const renderingEngine = getRenderingEngine(RENDERING_ENGINE_ID);
     const viewport = renderingEngine.getViewport(viewportId);
-    const actorEntries = viewport.getActors();
-
+    const actorEntries = viewport?.getActors();
+    if (!viewport || !actorEntries || actorEntries.length === 0) {
+      return;
+    }
     const setViewportProperties = (viewport, uid) => {
       const actorEntry = actorEntries.find(entry => entry.uid.includes(uid));
       const { actor: volumeActor, uid: volumeId } = actorEntry;