qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.

[kruthoff]

Version 0.76 doesn't start anymore on Pop!_OS 22.04 LTS x86_64. I've purged the app and have reinstalled it, without luck.

[akruthoff@gazelle-akr:~$ /opt/extratermqt/extratermqt 
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: xcb.

panic: Post "/command": unsupported protocol scheme ""

goroutine 1 [running]:
main.runCommand({0x0, 0x0}, 0xc0000e7ec8)
	/home/runner/work/extraterm-launcher/extraterm-launcher/cmd/extraterm-launcher/extraterm-launcher.go:200 +0x2e5
main.runOpenWindowAtCommand({0x0, 0x0}, {0xc00001c0dc, 0xf})
	/home/runner/work/extraterm-launcher/extraterm-launcher/cmd/extraterm-launcher/extraterm-launcher.go:135 +0xd4
main.main()
	/home/runner/work/extraterm-launcher/extraterm-launcher/cmd/extraterm-launcher/extraterm-launcher.go:40 +0x6a
[akruthoff@gazelle-akr:~$

[sedwards2009]

Is this running on Xorg or Wayland as display server?

[kruthoff]

Is this running on Xorg or Wayland as display server?

Running on Xorg.

[LackingCats]

try running export QT_QPA_PLATFORM=xcb before starting it from the command line

[paulrtcsjh]

I have this issue too, same exact message. I am running Ubuntu 24.04 and using Xorg. Running export as LackingCats suggested did not change the result.

[Ralms]

Running into the same issue on Ubuntu 22.04.05 LTS.

qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: xcb.

panic: Post "/command": unsupported protocol scheme ""

goroutine 1 [running]:
main.runCommand({0x0, 0x0}, 0xc0000dbec8)
	/home/runner/work/extraterm-launcher/extraterm-launcher/cmd/extraterm-launcher/extraterm-launcher.go:200 +0x2e5
main.runOpenWindowAtCommand({0x0, 0x0}, {0xc00001c0c4, 0xe})
	/home/runner/work/extraterm-launcher/extraterm-launcher/cmd/extraterm-launcher/extraterm-launcher.go:135 +0xd4
main.main()
	/home/runner/work/extraterm-launcher/extraterm-launcher/cmd/extraterm-launcher/extraterm-launcher.go:40 +0x6a

Doing the export QT_QPA_PLATFORM=xcb didn't fix it.

qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: xcb.

panic: Post "/command": unsupported protocol scheme ""

goroutine 1 [running]:
main.runCommand({0x0, 0x0}, 0xc0000dbec8)
	/home/runner/work/extraterm-launcher/extraterm-launcher/cmd/extraterm-launcher/extraterm-launcher.go:200 +0x2e5
main.runOpenWindowAtCommand({0x0, 0x0}, {0xc00001c0c4, 0xe})
	/home/runner/work/extraterm-launcher/extraterm-launcher/cmd/extraterm-launcher/extraterm-launcher.go:135 +0xd4
main.main()
	/home/runner/work/extraterm-launcher/extraterm-launcher/cmd/extraterm-launcher/extraterm-launcher.go:40 +0x6a

[niawag]

I was having the same problem on a fresh Linux Mint 22 install, I solved it by installing qt5ct, setting QT_QPA_PLATFORMTHEME=qt5ct in /etc/environment and installing this: sudo apt-get install -qq libglu1-mesa-dev libx11-xcb-dev '^libxcb*'

I'm not sure if it is all needed but it was failling before the last round of installs. Hope it helps !