show error message when preload can't build movies

Not sure why movie clip building is failing! But it happened outside our try-catch, so it left us in an infinite spinner state.

The repro item is the Spring Topiary Garden Background!

src/app/components/OutfitPreview.js

@@ -340,13 +340,24 @@ export function usePreloadLayers(layers) {
 
       if (canceled) return;
 
-      const newLayersHaveAnimations = assets.some(
+      let movieClips;
-        (a) =>
+      try {
-          a.type === "movie" &&
+        movieClips = assets
-          hasAnimations(buildMovieClip(a.library, a.libraryUrl))
+          .filter((a) => a.type === "movie")
-      );
+          .map((a) => buildMovieClip(a.library, a.libraryUrl));
+      } catch (e) {
+        console.error("Error building movie clips", e);
+        assetPromises.forEach((p) => {
+          if (p.cancel) {
+            p.cancel();
+          }
+        });
+        setError(e);
+        return;
+      }
+
+      setLayersHaveAnimations(movieClips.some(hasAnimations));
       setLoadedLayers(layers);
-      setLayersHaveAnimations(newLayersHaveAnimations);
     };
 
     loadAssets();