I have the same problem. When running the plot() function on my universe, it gives me RuntimeError: OpenMC aborted unexpectedly. If i run openmc -p from the same directory as my jupyter notebook, the following is written out
(openmc-env) <retracted> % openmc -p
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| The OpenMC Monte Carlo Code
Copyright | 2011-2022 MIT, UChicago Argonne LLC, and contributors
License | https://docs.openmc.org/en/latest/license.html
Version | 0.13.2
Date/Time | 2023-01-23 12:50:14
MPI Processes | 1
OpenMP Threads | 8
Reading settings XML file...
Reading cross sections XML file...
Reading materials XML file...
Reading geometry XML file...
Reading tallies XML file...
Preparing distributed cell instances...
Reading plot XML file...
=======================> PLOTTING SUMMARY <========================
Plot ID: 2
Plot file: plot_2.png
Universe depth: -1
Plot Type: Slice
Origin: 5 2 3
Width: 50 50
Coloring: Cells
Basis: XZ
Pixels: 400 400
Processing plot 2: plot_2.png...
libpng warning: Application built with libpng-1.4.12 but running with 1.6.39
zsh: segmentation fault openmc -p
so the same error as for @madhofs. I installed OpenMC according to the normal procedure on the website, and I am using a conda environment.