3d plotting - empty plot

[drammock (Dan McCloy)]

@astudenova

matplotlib:       3.6.0Backend QtAgg is interactive backend. Turning interactive mode on.
 {backend=QtAgg}
[...]
ipyvtklink:       Matplotlib support failed
Traceback (most recent call last):
  File "/afs/cbs.mpg.de/software/pycharm/2022.2/debian-bullseye-amd64/plugins/python-ce/helpers/pydev/_pydev_bundle/pydev_import_hook.py", line 25, in do_import
    succeeded = activate_func()
  File "/afs/cbs.mpg.de/software/pycharm/2022.2/debian-bullseye-amd64/plugins/python-ce/helpers/pydev/pydev_ipython/matplotlibtools.py", line 155, in activate_pylab
    pylab = sys.modules['pylab']
KeyError: 'pylab'

I’ve never seen this error occurring as part of mne.sys_info(). @larsoner any notion of what might be going on there?