I’ve also been encountering this issue on Fedora 35. I’ve tried a lot of things in the post Plex amp 3.01 on ubuntu 16.04 just displays a blank screen on start but had no luck.
It is able to get to the login page fine without error.
When I click login (doesn’t matter what way I login) it goes grey.
I don’t seem to get any logs generated either.
Another thing I would like to mention is that Plexamp works perfectly fine on my desktop which is running Linux Mint 20.2 Kernel 5.4.0.
System Information
OS: Fedora Linux 35 (Workstation Edition) x86_64
Host: 82BG Yoga 9 14ITL5
Kernel: 5.15.4-201.fc35.x86_64
Uptime: 1 hour, 20 mins
Packages: 1879 (rpm)
Shell: zsh 5.8
Resolution: 1920x1080
DE: GNOME 41.1
WM: Mutter
WM Theme: Adwaita
Theme: Adwaita-dark [GTK2/3]
Icons: Adwaita [GTK2/3]
Terminal: gnome-terminal
CPU: 11th Gen Intel i7-1185G7 (8) @ 4.800GHz
GPU: Intel TigerLake-LP GT2 [Iris Xe Graphics]
Memory: 3751MiB / 7521MiB
