Errors when starting jupyter notebook

[hubitor]

I'm getting these errors when I start jupyter notebook:
either:
ERROR:gpu_process_transport_factory.cc(1009)] Lost UI shared context.
ERROR:command_buffer_proxy_impl.cc(115)] ContextResult::kFatalFailure: Shared memory handle is not valid
or:
ERROR:browser_gpu_channel_host_factory.cc(121)] Failed to launch GPU process.

Installed notebook version and related packages:
notebook==5.0.0
jupyter-client==5.1.0
jupyter-console==5.2.0
jupyter-contrib-core==0.3.3
jupyter-contrib-nbextensions==0.3.3
jupyter-core==4.3.0
jupyter-highlight-selected-word==0.1.0
jupyter-latex-envs==1.4.0
jupyter-nbextensions-configurator==0.2.8
jupyterlab==0.27.0
jupyterlab-launcher==0.4.0

[takluyver]

Have a look at #2836