diff --git a/frontend/apps/editor3d/app/src/components/signaled/TopBar/TaskQueue.tsx b/frontend/apps/editor3d/app/src/components/signaled/TopBar/TaskQueue.tsx
index 080ea69aae..860ff413e7 100644
--- a/frontend/apps/editor3d/app/src/components/signaled/TopBar/TaskQueue.tsx
+++ b/frontend/apps/editor3d/app/src/components/signaled/TopBar/TaskQueue.tsx
@@ -128,6 +128,11 @@ const CompletedCard = ({
           <img
             src={task.thumbnailUrl}
             alt={task.title}
+            onError={(e) => {
+              console.log("Failed to load thumbnail", e);
+              // NB: Replace the broken thumbnail with a placeholder.
+              e.currentTarget.src="/resources/placeholders/placeholder.png";
+            }}
             className="h-full w-full object-cover"
           />
         ) : (
@@ -147,7 +152,7 @@ const CompletedCard = ({
         )}
         {task.completedAt && (
           <div className="text-base-fg text-xs opacity-60">
-            {task.completedAt}
+            {task.completedAt.toISOString()}
           </div>
         )}
       </div>
diff --git a/frontend/libs/components/gallery-modal/src/lib/GalleryDraggableItem.tsx b/frontend/libs/components/gallery-modal/src/lib/GalleryDraggableItem.tsx
index 624dc125d4..e4cc3cb155 100644
--- a/frontend/libs/components/gallery-modal/src/lib/GalleryDraggableItem.tsx
+++ b/frontend/libs/components/gallery-modal/src/lib/GalleryDraggableItem.tsx
@@ -26,7 +26,7 @@ interface GalleryDraggableItemProps {
   activeFilter: string;
   selected: boolean;
   onClick: () => void;
-  onImageError: () => void;
+  onImageError: (e: React.SyntheticEvent<HTMLImageElement>) => void;
   disableTooltipAndBadge?: boolean;
   imageFit?: "cover" | "contain";
   onDeleted?: (id: string) => void;
diff --git a/frontend/libs/components/gallery-modal/src/lib/gallery-modal.tsx b/frontend/libs/components/gallery-modal/src/lib/gallery-modal.tsx
index 307291ad92..71f8aa0781 100644
--- a/frontend/libs/components/gallery-modal/src/lib/gallery-modal.tsx
+++ b/frontend/libs/components/gallery-modal/src/lib/gallery-modal.tsx
@@ -637,9 +637,11 @@ export const GalleryModal = React.memo(
                                 activeFilter={activeFilter}
                                 selected={selectedItemIds.includes(item.id)}
                                 onClick={() => handleItemClick(item)}
-                                onImageError={() =>
-                                  handleImageError(item.thumbnail!)
-                                }
+                                onImageError={(e) => {
+                                  // NB: Replace the broken thumbnail with a placeholder.
+                                  e.currentTarget.src = "/resources/placeholders/placeholder.png";
+                                  handleImageError(item.thumbnail!);
+                                }}
                                 disableTooltipAndBadge={mode === "select"}
                                 imageFit={imageFit}
                                 onDeleted={handleItemDeleted}