Using PyPlot on CI suddenly fails

[kellertuer]

We are using PyPlot for some plots and hence our Testsuite also includes tests for the plotting.

Usually the setup worked (for a few years even) but I can not figure out why we are now getting (consistently) this error

https://github.com/JuliaManifolds/Manifolds.jl/actions/runs/3137202426/jobs/5095071788#step:5:763

Did something in PyPlot change? Sorry if this is not the right package to ask, but locally the tests run so I am a little bit out of ideas where to start to debug this.

[kellertuer]

Ah it was a hiccup (just longer than I expected, usually a second run fixes that, here it took 2-3 days).