OK, so I've installed Endless OS in a virtual machine and installed Audacity with the App Center.
When I first clicked the Launch button I got an error saying that the app was missing its runtime, and told be to click the "Update" button.
I clicked the update button, waited a few moments for it to complete, and then clicked the Launch button again. This time Audacity opened correctly.
The App Center downloads a "flatpak" package from
https://flathub.org/apps/search/audacity
The version of Audacity that is installed is 2.3.0 which is NOT an approved release for Linux. 2.3.0 is for Windows and macOS only. On Linux, 2.3.0 is "experimental" and known to have problems. Nevertheless, I would still expect it to at least run.
Try uninstalling it and then reinstall it, and then try to launch it from the App Center.
If that does not work, open a terminal and enter (replacing "<user name> with your user name):
Code: Select all
flatpak run org.audacityteam.Audacity 2>&1 | tee "/sysroot/home/<user name>/Documents/audacity-log.txt"
That should create a file called "audacity-log.txt" in your Documents folder. Upload that file so that we can have a look for clues.