# Websocket http error 403

**URL:** <https://discourse.jupyter.org/t/websocket-http-error-403/21141>\
**Category:** Zero to JupyterHub on Kubernetes\
**Created:** [August 29, 2023, 11:14am UTC](https://discourse.jupyter.org/t/websocket-http-error-403/21141 "2023-08-29T11:14:07Z")\
**Posts on this page:** 1\
**Showing post:** 8

<div class="post-metadata">

**Author:** ![minrk](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/minrk/32/13_2.png) [@minrk](https://discourse.jupyter.org/u/minrk)\
**Post date:** [September 11, 2023, 12:36pm UTC](https://discourse.jupyter.org/t/websocket-http-error-403/21141/8 "2023-09-11T12:36:55Z")

</div>

I’ve tracked it down to a bug in the new JupyterHub singleuser-server extension. If you set the `JUPYTERHUB_SINGLEUSER_EXTENSION=0` environment variable in your single-user environments (e.g. c.Spawner.environment), then I think this will work.

**update:** [patch fixing the bug](https://github.com/jupyterhub/jupyterhub/pull/4560)

---

_[View the full topic](https://discourse.jupyter.org/t/websocket-http-error-403/21141)._