Hello @jpbn
I don’t know. I use RedNotebook on a daily basis, and it works for me. I installed it using dnf (but I don’t see why Software should install something different).
You mean that clicking on the File a new Bug button doesn’t work? You are right.
I see that there is an open issue here: button file a new bug doesn't work when we click on tab bugs · Issue #425 · fedora-infra/fedora-packages · GitHub
As stated here: This is a list of commonly asked questions, you can follow this document: How to file a bug (in a nutshell: head to https://bugzilla.redhat.com, log in with the same account used here on Ask Fedora, then it is pretty straightforward).