Nbgrader on a new server

[Mad31]

Hi,
i try to install formgader on my new server in a docker.

I can't access to formgrader page , the server refuse the connexion !

thx for helping,

my configuration below :

adminjh@5ce4f66a9e1b:~$ jupyter --version
Selected Jupyter core packages...
IPython : 8.25.0
ipykernel : 6.29.4
ipywidgets : 8.1.3
jupyter_client : 8.6.2
jupyter_core : 5.7.2
jupyter_server : 2.14.1
jupyterlab : 4.2.2
nbclient : 0.10.0
nbconvert : 7.16.4
nbformat : 5.10.4
notebook : 7.2.1
qtconsole : 5.5.2
traitlets : 5.14.3

JupyterLab v4.2.2
/usr/local/share/jupyter/labextensions
jupyterlab_pygments v0.3.0 enabled OK (python, jupyterlab_pygments)
jupyter-py5 v0.1.0 enabled OK (python, py5jupyter)
jupyterlab-myst v2.4.2 enabled OK (python, jupyterlab_myst)
ipycanvas v0.13.2 enabled OK
nbgrader v0.9.2 enabled X (python, nbgrader)
@jupyter-notebook/lab-extension v7.2.1 enabled OK
@jupyter-widgets/jupyterlab-manager v5.0.11 enabled OK (python, jupyterlab_widgets)

[Mad31]

Remark :
I can do all in command line,but not with the formgrader page that i can't reach.

[brichet]

Thanks @Mad31 for opening this.
I'm seeing some issues with the current release of nbgrader and jupyterlab>=4.2.0.
Can you try downgrading jupyterlab to 4.1.x ?

Not sure it can be related to your server issue though

[Mad31]

No it's the same..
When i open inspector i have :
Refused to frame 'http://xx.xx.xx.xx:8000/' because an ancestor violates the following Content Security Policy directive: "frame-ancestors 'none'".

[brichet]

OK, your are probably running it with Jupyterhub 4.1.x.
I didn't try but there is a workaround here: #1870

[Mad31]

thx for all
adding to jupyter_config.py :

c.JupyterHub.tornado_settings = {'headers': {'Content-Security-Policy': "frame-ancestors *;"}}
c.Spawner.args = ['--NotebookApp.tornado_settings={"headers":{"Content-Security-Policy": "frame-ancestors *;"}}']

solve the problem