Thanks for posting and welcome to the community
Could you try putting this command in the first cell
!pip install openmc_source_plotter==0.6.3
Just to mention the neutronics-workshop has an issue tracker and discussions section where you are welcome to post bugs reports in if you think they are more related to the neutronics-workshop and not actual openmc errors
Sorry that command was one version out of date, it should be
!pip install openmc_source_plotter==0.6.4
I’ve now updated the neutronics-workshop docker image
So you could download the latest version with
docker pull ghcr.io/fusion-energy/neutronics-workshop
and run it with
docker run -p 8888:8888 ghcr.io/fusion-energy/neutronics-workshop
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