issue running galata ui tests #1623

Describe the bug
I'm unable to run the Galata tests using the instructions in the repo.
I'm currently only trying to run the tests to check they work, i'm not editing the code.

To Reproduce

mamba create -n bqplot-dev python bqplot jupyterlab
mamba activate bqplot-dev
cd ui-tests
npx playwright install

jlpm start

note / aside

i think there is an error in the the ui-tests/README.md
here it says to use jlpm run start-jlab which doesn't work:

in new terminal

mamba activate bqplot-dev
cd ui-tests
jlpm run test  # note, same outcome with: npx playwright test

it appears to work:

but then hangs for a long time.
no images are created from the notebooks -

a video is created:

video.webm

which shows juptyer launching but not running

Expected behavior
the tests to run and pass the visual regression tests