quick fix

io-app-backend/evaluate_system.py

@@ -65,10 +65,7 @@ def run_evaluation_with_models(lat, lon, buffer_km=5, max_cloud_cover=20, days_b
     dl_result = tm.download_sentinel2(lat, lon, buffer_km, max_cloud_cover, days_back)
 
     if dl_result is None:
-        return jsonify({
-            'success': False,
-            'error': 'Satellite data unavailable for given analysis parameters.'
-        }), 404
+        return {"error": "Satellite data unavailable for given analysis parameters."}
 
     raw_data, date, scene_id = dl_result