RuntimeError: Unable to open ./checkpoints/shape_predictor_68_face_landmarks.dat

[TzyTman]

python inference.py --driven_audio /home/mk/SadTalker-Video-Lip-Sync-master/input_audio/xiaobao.MP3 --source_video /home/mk/SadTalker-Video-Lip-Sync-master/input_video/xiaobao.mp4 --time_step 0.5
./checkpoints/epoch_20.pth
Traceback (most recent call last):
File "inference.py", line 123, in
main(args)
File "inference.py", line 47, in main
preprocess_model = CropAndExtract(path_of_lm_croper, path_of_net_recon_model, dir_of_BFM_fitting, device)
File "/home/mk/SadTalker-Video-Lip-Sync-master/src/utils/preprocess.py", line 43, in init
self.croper = Croper(path_of_lm_croper)
File "/home/mk/SadTalker-Video-Lip-Sync-master/src/utils/croper.py", line 38, in init
self.predictor = dlib.shape_predictor(path_of_lm)
RuntimeError: Unable to open ./checkpoints/shape_predictor_68_face_landmarks.dat