As I read in this forum, I started installing precice on top of the fenics docker image (specifically, dolfinx/dolfinx:nightly).
I followed the installation steps for Ubuntu given here:
https://precice.org/installation-packages.html#ubuntu
Then I installed python bindings as explained here:
https://precice.org/installation-bindings-python.html#installation
Then I downloaded the solverdummy case files and I run the given commands on two terminals:
python3 solverdummy.py precice-config.xml SolverOne
python3 solverdummy.py precice-config.xml SolverTwo
of course I read the Readme file before and installed all the needed requirements.
It seems related to something not working with the configuration file, like r/w permissions or network.
What I can tell you is that the solvers work perfectly outside of the container, if I install preCICE directly on my system.
Thank you