Plexamp 3.1.1 crashing on Linux (kubuntu 20.04)

Plexamp 3.1.1 launching on kubuntu 20.04 starts the app up, gives the toast popup to tell me the song, but doesn’t display the app itself. The app runs until I kill it, but doesn’t do anything. Output from running it in a terminal below:

~/bin/Plexamp (72.380 Mb)$ ./Plexamp-3.1.1.AppImage
xdg-mime: application argument missing
Try 'xdg-mime --help' for more information.
Couldn't install shortcut for MediaPlayPause.
Couldn't install shortcut for MediaPreviousTrack.
Couldn't install shortcut for MediaNextTrack.
Started Media Service: false
Linux: Registering MPRIS service.
../../sandbox/linux/seccomp-bpf-helpers/sigsys_handlers.cc:**CRASHING**:seccomp-bpf failure in syscall 0230
(node:126832) Electron: Loading non context-aware native modules in the renderer process is deprecated and will stop working at some point in the future, please see https://github.com/electron/electron/issues/18397 for more information
(node:126832) Electron: Loading non context-aware native modules in the renderer process is deprecated and will stop working at some point in the future, please see https://github.com/electron/electron/issues/18397 for more information
(node:126832) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
(node:126832) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.

The error around seccomp appears to be related to a glibc change that also affected chrome and firefox.

Any help appreciated.

Thanks.

Seems to be an issue happening to many on Linux in general and more specifically 20.04. See posts like Plexamp fails to launch in Ubuntu 20.04 and Plex amp 3.01 on ubuntu 16.04 just displays a blank screen on start

Also posted in the subreddit to see if anyone has a solution.

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