Plex amp 3.01 on ubuntu 16.04 just displays a blank screen on start

Also having the same issue on PopOS 20.04.
Version: Plexamp-3.1.1.AppImage
Permissions: -rwxrwxr-x

After removing the config Plexamp I get the following after running from terminal:

➜ ~ ./Plexamp-3.1.1.AppImage
Couldn’t install shortcut for Shift+CommandOrControl+Space.
Couldn’t install shortcut for Shift+Command+Control+Option+0.
Couldn’t install shortcut for Shift+Command+Control+Option+1.
Couldn’t install shortcut for Shift+Command+Control+Option+2.
Couldn’t install shortcut for Shift+Command+Control+Option+3.
Couldn’t install shortcut for Shift+Command+Control+Option+4.
Couldn’t install shortcut for Shift+Command+Control+Option+5.
Couldn’t install shortcut for Shift+CommandOrControl+Option+Right.
Couldn’t install shortcut for CommandOrControl+Option+Up.
Couldn’t install shortcut for CommandOrControl+Option+Down.
Couldn’t install shortcut for Shift+Alt+Space.
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:10332) 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:10332) 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

Running with “–no-sandbox” like others said starts the app but you cannot sign-in.