do not fail when there are no models in requests dataset

frontend/src/pages/AddModelPage/components/SubmissionLimitChecker/SubmissionLimitChecker.js

@@ -20,7 +20,13 @@ function SubmissionLimitChecker({ user, children }) {
           `/api/models/organization/${user.username}/submissions?days=7`
         );
         if (!response.ok) {
-          throw new Error("Failed to fetch submission data");
+          // TODO: consider making this a failure once the leaderboard
+          // starts getting a lot of traffic
+          console.error("Failed to fetch submission data");
+          setError(false);
+          setReachedLimit(false);
+
+          return
         }
 
         const submissions = await response.json();