Clarify unavailable model IDs

static-app.js

@@ -178,7 +178,7 @@
     try {
       const encoded = repo.split("/").map(encodeURIComponent).join("/");
       const apiResponse = await fetch(`https://huggingface.co/api/models/${encoded}`);
-      if (apiResponse.status === 404) throw new Error("That public model repository was not found.");
+      if ([401, 403, 404].includes(apiResponse.status)) throw new Error("That model ID is not available as a public Hub repository. Check the ID or choose a public, ungated model.");
       if (!apiResponse.ok) throw new Error("The Hub API could not be reached. Try again shortly.");
       const api = await apiResponse.json();
       if (api.private || api.gated) throw new Error("That model is private or gated. This version reviews public cards only.");