The dev asked to run a few CLI to get more details.
He says Kresus runs fine in the background and suggests the issue may come from somewhere else, and advised I seek help here.
My YunoHost server
Hardware: Raspberry Pi 4 YunoHost version: 11.2.5 (stable) I have access to my server : through the webadmin Are you in a special context or did you perform some particular tweaking on your YunoHost instance ? : no / yes
I debugged port accessibility using the yunohost diagnostics tool
I managed to debunk everything (took me a full day cause I'm not an admin, first time messing with a server, learning as I do it)
All ports accessible, all diagnostics green except 2 things I could not debug:
Description of my issue
Installed yunohost on my raspberry pi 4 => worked
Installed Kresus on Yunohost (via webadmin) => worked
When launching Kresus (from webadmin):
it runs
BUT: the page does not open and I get a timed out message