small bug correction

simuGAIA.py

@@ -254,9 +254,12 @@ def run_simuGAIA_all( profile: gr.OAuthProfile | None, submit: Optional[bool] =
                 json_path = "already_answered.json"
                 try:
                     if os.path.exists(json_path):
-                        with open(json_path, "r", encoding="utf-8") as f:
-                            data = json.load(f)
-                        if not isinstance(data, list):
+                        try:
+                            with open(json_path, "r", encoding="utf-8") as f:
+                                data = json.load(f)
+                            if not isinstance(data, list):
+                                data = []
+                        except (json.JSONDecodeError, ValueError):
                             data = []
                     else:
                         data = []