Fix to animation group parsing

src/Animations/animationGroup.ts

@@ -575,7 +575,7 @@ export class AnimationGroup implements IDisposable {
             }
         }
 
-        if (parsedAnimationGroup.from !== null && parsedAnimationGroup.from !== null) {
+        if (parsedAnimationGroup.from !== null && parsedAnimationGroup.to !== null) {
             animationGroup.normalize(parsedAnimationGroup.from, parsedAnimationGroup.to);
         }