Fix Gnome software stuck in “Loading Software Catalog” message

“Software” is the default Gnome graphics tool for installing applications and extensions. It is used not only in Linux distributions that use the Gnome desktop, but also in other distributions such as Xubuntu (Xfce-based Ubuntu).Sometimes Gnome Software fails to load and falls into the “Loading Software Catalog” stage. I have happened several times on laptops and desktops (one running Ubuntu and the other running Fedora) and the only workaround that works in both cases is to delete the Gnome Software application cache and kill Gnome Software (Because the application runs in the background even after closing).So, to fix Gnome Software that says “Loaded Software Catalog is Loading”, use the following two commands to kill the application and delete its cache:

killall gnome-software
rm -rf ~/.cache/gnome-software

As for what is causing this problem … I think the Gnome software cache is corrupted in some way, but I don’t know what is causing it and how to prevent it. This is not an easily reproducible problem, so it is difficult to debug. We hope that this issue will be resolved in the next Gnome release.
And one more thing. Not long ago, I also encountered another weird Gnome software error-the application will launch and display categories, but the application list is empty. I haven’t had this issue for a long time, so I’m not sure if the fixes mentioned above will also resolve this issue.

Fixed an issue where Gnome Software could not update the Flatpak application, and could not update the “(null)” error

I don’t want to post a new article for this, so I decided to add it as an update to this article. I recently encountered a new error where Gnome Software was unable to update the Flatpak application and displayed an error message with the following: Unable to update "(null)". I can fix this by updating Flatpaks from the command line using the following command:

sudo flatpak update

Either:

flatpak --user update

It depends on how you install Flatpaks: user-only or system-wide. Use only one.
After that, kill the Gnome software:

killall gnome-software

Source

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