Welcome, @Cecile
Thanks for sharing so many details! I’ve cross-posted your question over to our Admin chat to learn if someone recognizes what may be going wrong. They will probably reply here but you can join the chat group too! You're invited to talk on Matrix
What might help more is sharing some specifications about your server and environment.
- What version of Galaxy are you running? The most current stable release is here → 24.1 Galaxy Release (June 2024) — Galaxy Project 24.1.0.dev0 documentation
- What is your OS?
- Versions of the programs involved might matter, not sure, but all of these were working originally?
- Did anything on your side change? Upgrading or installing? OS update? Different network?
Related prior Q&A. Getting rid of the current venv and letting that build again was this person’s solution. You could try that, too, to see what happens. → Bug trying to install locally galaxy
Let’s start there, thanks! 