Plex Desktop won't start on Omarchy (Arch + Hyprland, Wayland)

Plex Players Desktop Players
1

Server Version#: 1.42.2.10156
Player Version#: plex-desktop 1.110.0.351-1 installed via AUR AUR (en) - plex-desktop

I’ve been trying for several hours to get Plex Desktop running on Omarchy which has a base of Arch linux with Hyprland on top of it, with Wayland as the display server protocol.

I keep getting this error no matter what I tryin the logs (it won’t even start / show an error or anything):

Fatal error: qrc:/views/WebWindow.qml: module "kvantum" is not installed

My pacman -Q | grep kvantum shows:

kvantum 1.1.5-1
kvantum-qt5 1.1.5-1

I also added several env settings to the CLI and the .desktop file to try to make it work, but again the error keeps coming up and Plex won’t start.

Here is an example from Reddit - The heart of the internet

cd /opt/plex-desktop
QT_QPA_PLATFORM=xcb QT_QUICK_CONTROLS_STYLE=Material ./Plex.sh

(I basically followed the steps to update the .desktop file to the env’s provided.)

What am I missing / how can I resolve this?

Here is a more complete last bit of the log:

Sep 25, 2025 12:40:48.383 [140467318689344] ERROR - [DisplayManager] Unable to retrieve main display
Sep 25, 2025 12:40:48.383 [140467318689344] DEBUG - [Controllers] Loading QML engine.
Sep 25, 2025 12:40:48.384 [140467318689344] INFO - [Controllers] Loading qrc:/views/WebWindow.qml.
Sep 25, 2025 12:40:48.384 [140467318689344] DEBUG - [Controllers] [QML] Loading QML component from qrc:/views/WebWindow.qml.
Sep 25, 2025 12:40:48.396 [140467318689344] ERROR - [Controllers] qrc:/views/WebWindow.qml: module “kvantum” is not installed
Sep 25, 2025 12:40:48.396 [140467318689344] INFO - [Application] Terminated.
Sep 25, 2025 12:40:48.396 [140467318689344] INFO - [NanoServer] Stopping nano server.
Sep 25, 2025 12:40:48.443 [140465798108864] WARN - [Widevine] Version list request returned code 404.
Sep 25, 2025 12:40:48.443 [140465798108864] WARN - [Widevine] Failed to update CDM: Bad response code on version list.
Sep 25, 2025 12:40:48.538 [140467318689344] INFO - [Controllers] Unloading qrc:/views/WebWindow.qml.
Sep 25, 2025 12:40:48.538 [140467318689344] WARN - [Controllers] QCoreApplication::postEvent: Unexpected null receiver
Sep 25, 2025 12:40:48.538 [140467318689344] DEBUG - [Controllers] Unloading QML engine.
Sep 25, 2025 12:40:48.543 [140467318689344] ERROR - Fatal error: qrc:/views/WebWindow.qml: module “kvantum” is not installed

and doing a grep on ‘ERROR’ leads to these lines:

Sep 25, 2025 12:40:48.382 [140466771195584] ERROR - [MPVEngine/mpv] cplayer: Can't load unknown script: /home/naxels/.local/share/plex/scripts/scripting.md
Sep 25, 2025 12:40:48.383 [140467318689344] ERROR - [DisplayManager] Unable to retrieve main display
Sep 25, 2025 12:40:48.396 [140467318689344] ERROR - [Controllers] qrc:/views/WebWindow.qml: module "kvantum" is not installed
Sep 25, 2025 12:40:48.543 [140467318689344] ERROR - Fatal error: qrc:/views/WebWindow.qml: module "kvantum" is not installed
2

ChatGPT even suggested copying over the libkvantum.so file to /opt/plex-desktop/plugins/ (platformthemes and/or styles) but that also didn’t fix it for me

origins:

/usr/lib/qt6/plugins/styles/libkvantum.so
/usr/lib/qt/plugins/styles/libkvantum.so

3

I don’t use Arch and can’t help with that specific error, but have you considered trying the official flatpak linux desktop distribution?

4

The idea in Omarchy is to use AUR and Arch packages as much as possible. And i kinda dislike snap/flatpak, not the idea which is great but the additional setup/update/permissions/management of it all.. the fights i’ve had on Ubuntu ha

i use AppImage for PlexAmp which is in AUR, unfortunately i didn’t see an AppImage for Plex Desktop

5

Regarding the Flatpak build,

I checked the source of both the Flatpak and AUR, they both take the same file:

https://artifacts.plex.tv/plex-desktop-stable/1.110.0.351-4e48eb83/linux/Plex-1.110.0.351-4e48eb83-linux-x86_64.tar.bz2

6

QT_STYLE_OVERRIDE=’’ as a pre-launch argument should fix it

7

OMG how did I not see this one! I did look at it in the Terminal as it says:

> export
declare -x QT_IM_MODULE="fcitx"
declare -x QT_QPA_PLATFORM="wayland;xcb"
declare -x QT_STYLE_OVERRIDE="kvantum"

but since I’m not familiar with QT I didn’t think anything of messing with that style setting..

Now i’m past that issue, on to the next ha!

Thanks so much!!

8

Here is what ultimately got it working on Omarchy:

QT_STYLE_OVERRIDE=‘’ QT_QPA_PLATFORM=xcb QT_QUICK_CONTROLS_STYLE=Material Plex
9

Went thru more or less the same struggle like 2 weeks ago… Glad I could help.

10

Same issue now it complains ‘‘ doesn’t exist..

Sep 29, 2025 15:41:31.087 [140701285293632] ERROR - Fatal error: qrc:/views/WebWindow.qml: module “‘’” is not installed