How to fix Jupyter Hub No such file or directory: 'configurable-http-proxy'


When trying to start Jupyter Hub, you see an error message like

[E 2021-06-18 13:07:48.462 JupyterHub proxy:711] Failed to find proxy ['configurable-http-proxy']
    The proxy can be installed with `npm install -g configurable-http-proxy`.To install `npm`, install nodejs which includes `npm`.If you see an `EACCES` error or permissions error, refer to the `npm` documentation on How To Prevent Permissions Errors.
[C 2021-06-18 13:07:48.462 JupyterHub app:2739] Failed to start proxy
    Traceback (most recent call last):
      File "/usr/local/lib/python3.8/dist-packages/jupyterhub/", line 2737, in start
        await self.proxy.start()
      File "/usr/local/lib/python3.8/dist-packages/jupyterhub/", line 707, in start
        self.proxy_process = Popen(
      File "/usr/lib/python3.8/", line 854, in __init__
        self._execute_child(args, executable, preexec_fn, close_fds,
      File "/usr/lib/python3.8/", line 1702, in _execute_child
        raise child_exception_type(errno_num, err_msg, err_filename)
    FileNotFoundError: [Errno 2] No such file or directory: 'configurable-http-proxy'


As outlined in the Jupyter Hub installation docs, you need to install the configurable-http-proxy npm package in order for Jupyter to work:

sudo npm install -g configurable-http-proxy

In case you haven’t installed npm, see our article on How to install NodeJS 14.x LTS on Ubuntu in 1 minute or find the appropriate distribution for your OS on the NodeJS download page.