Broken if no Internet Connection Available

[MrNickArcher]

Does not work without internet connection; gets stuck in loading screen. (using through pyvista, in a VS Code notebook) I belive the issue is with trame and not pyvista itself?

A clear and concise description of what the bug is. Before submitting, please remove unnecessary sections.

To Reproduce

Steps to reproduce the behavior:

1. disable internet connection
2. try to plot mesh in pyvista

Code

# disable internet, restart VS Code, create blank .ipynb
import pyvista as pv
pv.Icosahedron().plot()

developer console output:

index-5844b947.js:23 error: Uncaught TypeError: Cannot read properties of null (reading '0')
Fs.console.error @ index-5844b947.js:23
(anonymous) @ index-5844b947.js:23
setTimeout
i @ trame-vtk.js:1
Promise.then
t0 @ vue.global.js:5
updateViewState @ trame-vtk.js:3564
await in updateViewState
(anonymous) @ trame-vtk.js:3564
(anonymous) @ vue.global.js:5
tq @ vue.global.js:5
tW @ vue.global.js:5
t.__weh.t.__weh @ vue.global.js:5
t4 @ vue.global.js:5
ec @ vue.global.js:5
mount @ vue.global.js:5
t.mount @ vue.global.js:5
Fs @ index-5844b947.js:23
await in Fs
(anonymous) @ index-5844b947.js:23
trame-vtk.js:1 Uncaught TypeError: Cannot read properties of null (reading '0')
    at Ge (trame-vtk.js:1:9731)
    at t.setCameraShaderParameters (trame-vtk.js:189:8250)
    at Q5.t.updateShaders (trame-vtk.js:7:15366)
    at Q5.t.drawArrays (trame-vtk.js:7:14002)
    at t.renderPieceDraw (trame-vtk.js:189:11585)
    at t.renderPiece (trame-vtk.js:189:12388)
    at t.render (trame-vtk.js:178:3470)
    at t.opaquePass (trame-vtk.js:178:3204)
    at t.apply (trame-vtk.js:1:62141)
    at t.traverse (trame-vtk.js:1:62005)

Expected behavior

I don't think generally a python plotting package should be loading external resources please package all resources. I don't know what it is trying to load? The only thing i can see is that it depends on google fonts which are not available, but i don't see how that is causing the JavaScript error?

Platform:

Device:

• Desktop

OS:

• Windows

Browsers Affected:

• VS Code Python Notebook (i.e. Windows Webview2)
• Chrome
• Firefox
• Microsoft Edge
• Safari
• Opera
• Brave
• IE 11

[jourdain]

Done the following and it worked for me

uv venv -p 3.11
source .venv/bin/activate\n
uv pip install "pyvista[all]"
uv pip install jupyterlab

Turn wifi off

jupyter lab

Execute the following in the cell

import pyvista as pv
pv.Icosahedron().plot()

I can see the 3D view with everything

[jourdain]

uv pip list

Package                   Version
------------------------- --------------
aiohappyeyeballs          2.6.1
aiohttp                   3.12.13
aiosignal                 1.3.2
anyio                     4.9.0
appnope                   0.1.4
argon2-cffi               25.1.0
argon2-cffi-bindings      21.2.0
arrow                     1.3.0
asttokens                 3.0.0
async-lru                 2.0.5
attrs                     25.3.0
babel                     2.17.0
beautifulsoup4            4.13.4
bleach                    6.2.0
certifi                   2025.6.15
cffi                      1.17.1
charset-normalizer        3.4.2
cmocean                   4.0.3
colorcet                  3.1.0
comm                      0.2.2
contourpy                 1.3.2
cycler                    0.12.1
debugpy                   1.8.14
decorator                 5.2.1
defusedxml                0.7.1
executing                 2.2.0
fastjsonschema            2.21.1
fonttools                 4.58.4
fqdn                      1.5.1
frozenlist                1.7.0
h11                       0.16.0
httpcore                  1.0.9
httpx                     0.28.1
idna                      3.10
imageio                   2.37.0
ipykernel                 6.29.5
ipython                   9.3.0
ipython-pygments-lexers   1.1.1
ipywidgets                8.1.7
isoduration               20.11.0
jedi                      0.19.2
jinja2                    3.1.6
json5                     0.12.0
jsonpointer               3.0.0
jsonschema                4.24.0
jsonschema-specifications 2025.4.1
jupyter-client            8.6.3
jupyter-core              5.8.1
jupyter-events            0.12.0
jupyter-lsp               2.2.5
jupyter-server            2.16.0
jupyter-server-proxy      4.4.0
jupyter-server-terminals  0.5.3
jupyterlab                4.4.4
jupyterlab-pygments       0.3.0
jupyterlab-server         2.27.3
jupyterlab-widgets        3.0.15
kiwisolver                1.4.8
markdown-it-py            3.0.0
markupsafe                3.0.2
matplotlib                3.10.3
matplotlib-inline         0.1.7
mdurl                     0.1.2
meshio                    5.3.5
mistune                   3.1.3
more-itertools            10.7.0
msgpack                   1.1.1
multidict                 6.6.3
nbclient                  0.10.2
nbconvert                 7.16.6
nbformat                  5.10.4
nest-asyncio              1.6.0
notebook-shim             0.2.4
numpy                     2.3.1
overrides                 7.7.0
packaging                 25.0
pandocfilters             1.5.1
parso                     0.8.4
pexpect                   4.9.0
pillow                    11.2.1
platformdirs              4.3.8
pooch                     1.8.2
prometheus-client         0.22.1
prompt-toolkit            3.0.51
propcache                 0.3.2
psutil                    7.0.0
ptyprocess                0.7.0
pure-eval                 0.2.3
pycparser                 2.22
pygments                  2.19.2
pyparsing                 3.2.3
python-dateutil           2.9.0.post0
python-json-logger        3.3.0
pyvista                   0.45.2
pyyaml                    6.0.2
pyzmq                     27.0.0
referencing               0.36.2
requests                  2.32.4
rfc3339-validator         0.1.4
rfc3986-validator         0.1.1
rich                      14.0.0
rpds-py                   0.25.1
scooby                    0.10.1
send2trash                1.8.3
setuptools                80.9.0
simpervisor               1.0.0
six                       1.17.0
sniffio                   1.3.1
soupsieve                 2.7
stack-data                0.6.3
terminado                 0.18.1
tinycss2                  1.4.0
tornado                   6.5.1
traitlets                 5.14.3
trame                     3.10.2
trame-client              3.9.1
trame-common              1.0.0
trame-server              3.4.2
trame-vtk                 2.9.0
trame-vuetify             3.0.1
types-python-dateutil     2.9.0.20250516
typing-extensions         4.14.0
uri-template              1.3.0
urllib3                   2.5.0
vtk                       9.4.2
wcwidth                   0.2.13
webcolors                 24.11.1
webencodings              0.5.1
websocket-client          1.8.0
widgetsnbextension        4.0.14
wslink                    2.3.4
yarl                      1.20.1