Installed Javascript kernel but getting Kernel Error

Whenever I try switching the running Kernel in my Jupyter notebook from Python to Javascript (Node.js), I get the following error:

`Traceback (most recent call last):
File "/Library/Python/2.7/site-packages/tornado/web.py", line 1592, in _execute
result = yield result
File "/Library/Python/2.7/site-packages/tornado/gen.py", line 1133, in run
value = future.result()
File "/Library/Python/2.7/site-packages/tornado/concurrent.py", line 261, in result
raise_exc_info(self._exc_info)
File "/Library/Python/2.7/site-packages/tornado/gen.py", line 1141, in run
yielded = self.gen.throw(*exc_info)
File "/Users/tanejar/Library/Python/2.7/lib/python/site-packages/notebook/services/sessions/handlers.py", line 73, in post
type=mtype))
File "/Library/Python/2.7/site-packages/tornado/gen.py", line 1133, in run
value = future.result()
File "/Library/Python/2.7/site-packages/tornado/concurrent.py", line 261, in result
raise_exc_info(self._exc_info)
File "/Library/Python/2.7/site-packages/tornado/gen.py", line 1141, in run
yielded = self.gen.throw(*exc_info)
File "/Users/tanejar/Library/Python/2.7/lib/python/site-packages/notebook/services/sessions/sessionmanager.py", line 79, in create_session
kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name)
File "/Library/Python/2.7/site-packages/tornado/gen.py", line 1133, in run
value = future.result()
File "/Library/Python/2.7/site-packages/tornado/concurrent.py", line 261, in result
raise_exc_info(self._exc_info)
File "/Library/Python/2.7/site-packages/tornado/gen.py", line 1141, in run
yielded = self.gen.throw(*exc_info)
File "/Users/tanejar/Library/Python/2.7/lib/python/site-packages/notebook/services/sessions/sessionmanager.py", line 92, in start_kernel_for_session
self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name)
File "/Library/Python/2.7/site-packages/tornado/gen.py", line 1133, in run
value = future.result()
File "/Library/Python/2.7/site-packages/tornado/concurrent.py", line 261, in result
raise_exc_info(self._exc_info)
File "/Library/Python/2.7/site-packages/tornado/gen.py", line 326, in wrapper
yielded = next(result)
File "/Users/tanejar/Library/Python/2.7/lib/python/site-packages/notebook/services/kernels/kernelmanager.py", line 160, in start_kernel
super(MappingKernelManager, self).start_kernel(**kwargs)
File "/Library/Python/2.7/site-packages/jupyter_client/multikernelmanager.py", line 110, in start_kernel
km.start_kernel(**kwargs)
File "/Library/Python/2.7/site-packages/jupyter_client/manager.py", line 259, in start_kernel
**kw)
File "/Library/Python/2.7/site-packages/jupyter_client/manager.py", line 204, in _launch_kernel
return launch_kernel(kernel_cmd, **kw)
File "/Library/Python/2.7/site-packages/jupyter_client/launcher.py", line 138, in launch_kernel
proc = Popen(cmd, **kwargs)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 710, in __init__
errread, errwrite)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1335, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory`

I'm not sure what's going on. I did jupyter kernelspec list and sure enough I have 2 kernels and their paths, I navigated the path for the python one and the argv first instance is set to usr/bin/python.

Start by checking the JavaScript kernelspec listed by `jupyter kernelspec list`, including its `argv` entry, and compare it with the Python kernelspec path shown in the report. Reproduce switching from Python to JavaScript while observing the session and kernel startup paths. Done when the JavaScript kernel starts without the reported `OSError: [Errno 2] No such file or directory`.

Written by the indexing model from the issue text.