I can't launch Audacity.

My operating system is Kubuntu 20.04.
I installed Audacity by entering

flatpak install --from https://flathub.org/repo/appstream/org.audacityteam.Audacity.flatpakref

on my terminal. However, after I double clicked Audacity, it didn’t give me any responses. I tried to enter

flatpak run org.audacityteam.Audacity

on my terminal, but it showed
org.audacityteam.Audacity not installed

Try the Audacity Team (official) version of Audacity. It’s available as an AppImage from the Audacity website: https://www.audacityteam.org/download/

After I updated to 3.1.3, I don’t have any problems.