Error few commands are not working

[tomriddle54]

/help is working
/ping is working

but when i type youtube its showing this error

Traceback (most recent call last):
File "/home/ubuntu/Whatapp/yowsup/src/utils/media_sender.py", line 50, in send_by_url
file_path = self._download_file(file_url)
File "/home/ubuntu/Whatapp/yowsup/src/utils/media_sender.py", line 155, in _download_file
video.download(file_path)
File "/usr/local/lib/python2.7/dist-packages/pytube/models.py", line 73, in download
raise OSError('Make sure path exists.')
OSError: Make sure path exists.

and when i type /s apple

router.py [ERROR][2017-09-09 14:06:39,507] Error routing message: /s apple
Message:
ID: 3EB0C0FB1F85CD50E719
From: [email protected]
Type: text
Timestamp: 1504965998
Body: /s apple
Traceback (most recent call last):
File "/home/ubuntu/Whatapp/yowsup/src/router.py", line 76, in handle_callback
data = callback(message, match)
File "/home/ubuntu/Whatapp/yowsup/src/views/google.py", line 29, in google_search
page_url = urllib.unquote(req.json()["responseData"]["results"][0]["url"])
TypeError: 'NoneType' object has no attribute 'getitem'