Update app.py

app.py

@@ -225,7 +225,7 @@ def submit(
     response = requests.post(endpoint_url, headers=headers, json=payload)
 
     if response.status_code == 400:
-        return f"Malformed data in {payload}"
+        return f"{response.text}. Malformed data in {payload}"
     elif response.status_code == 401:
         return "Invalid token"
     elif response.status_code == 409: