Run SVM detector error

[bosunrunner]

When I run main.py and set demo =1, It return errors below:
File "E:/PycharmProject/vehicle-detection/main.py", line 37, in
draw_img = pipeline_svm(image)
File "E:/PycharmProject/vehicle-detection/main.py", line 16, in pipeline_svm
output = vehicle_detection_svm(img_undist, img_lane_augmented, lane_info)
File "E:\PycharmProject\vehicle-detection\svm_pipeline.py", line 556, in vehicle_detection_svm
hog_feat)
File "E:\PycharmProject\vehicle-detection\svm_pipeline.py", line 355, in find_cars
test_features = X_scaler.transform(X)
File "D:\DIYPrograms\Anaconda3\lib\site-packages\sklearn\preprocessing_data.py", line 794, in transform
force_all_finite='allow-nan')
File "D:\DIYPrograms\Anaconda3\lib\site-packages\sklearn\base.py", line 436, in _validate_data
self._check_n_features(X, reset=reset)
File "D:\DIYPrograms\Anaconda3\lib\site-packages\sklearn\base.py", line 373, in check_n_features
"The reset parameter is False but there is no "
RuntimeError: The reset parameter is False but there is no n_features_in attribute. Is this estimator fitted?