Error with demos

[KhurramPirov]

Can you send your files with demonstrations? And please explain how to debug this:

File "/home/khurram/DL_skoltech/Research_hand/HER_overcoming_exploration/experiment/ddpg.py", line 155, in initDemoBuffer
demoData = np.load(demoDataFile)
File "/home/khurram/.local/lib/python3.6/site-packages/numpy/lib/npyio.py", line 422, in load
fid = open(os_fspath(file), "rb")
IsADirectoryError: [Errno 21] Is a directory: '/home/khurram/DL_skoltech/'