fix thumbnail performance

src/views/post/post.tsx

@@ -105,7 +105,7 @@ const PostPage = () => {
       )}
       {/* TODO: remove this replyCount error once api supports scrolling replies pages */}
       {replyCount > 60 && <span className={styles.error}>Error: this thread has too many replies, some of them cannot be displayed right now.</span>}
-      {error && <span className={styles.error}>Error: {error?.message || error}</span>}
+      {error && <span className={styles.error}>Error: {error?.message || error?.toString?.()}</span>}
       {isInDescriptionView ? (
         <SubplebbitDescription
           avatarUrl={suggested?.avatarUrl}