yarn upgrade.

package.json

@@ -8,7 +8,7 @@
         "@types/luxon": "^1.15.2",
         "camera-controls": "^1.14.1",
         "golden-layout": "^1.5.9",
-        "javascript-lp-solver": "^0.4.5",
+        "javascript-lp-solver": "0.4.17",
         "js-logger": "^1.6.0",
         "lodash": "^4.17.15",
         "luxon": "^1.19.3",

src/viewer/rendering/Model3DRenderer.ts

@@ -217,7 +217,7 @@ export class Model3DRenderer extends Renderer implements Disposable {
         if (this.animation && !this.animation.action.paused) {
             const time = this.animation.action.time;
             this.update_animation_time = false;
-            model_store.animation_frame.val = time * PSO_FRAME_RATE + 1;
+            model_store.set_animation_frame(time * PSO_FRAME_RATE + 1);
             this.update_animation_time = true;
         }
     }