chore: fixing an issue for circuits with keys.

play_with_endpoint.py

@@ -30,7 +30,7 @@ headers = {
 def query(payload, allowed_retries=2):
     response = requests.post(API_URL, headers=headers, json=payload)
 
-    if "error" in response.json():
+    if response.json() is not None and "error" in response.json():
         if allowed_retries > 0:
             # Sometimes we have "Bad gateway" error
             print(f"Warning, error {response=} {response.json()=} in the query, relaunching")
@@ -74,6 +74,7 @@ while not is_finished:
         evaluation_keys_remaining = evaluation_keys_remaining[packet_size:]
     else:
         evaluation_keys_piece = evaluation_keys_remaining
+        evaluation_keys_remaining = None
         is_finished = True
 
     print(