Error when running

[SmokingWalrus]

Running on: Arch Linux [KDE Plasma Desktop Enviroment] after facing the issue i installed the linux headers but with no luck

  framerate: 60,
  device: 50,
  resolution: "",
  ffmpeg: [],
  border: false,
  sound: false,
  wayland: false,
  loggerOptions: { verbose: true },
  execOptions: { verbose: true, output: 3 }
}
DEBUG Checking if V4L2 device exists
DEBUG V4L2 device not found with id 50, creating it

Exec Context: b80876d1-dbae-49ac-93ac-e00857ea7fa4
    Exec Options:  { verbose: true, output: 3 }
    Exec Command: sudo modprobe -r v4l2loopback
    Exec Command Splits:  [sudo,modprobe,-r,v4l2loopback]
    Exec Result:  { code: 1, success: false },
 output: "modprobe: FATAL: Module v4l2loopback is in use."
Exec Context: b80876d1-dbae-49ac-93ac-e00857ea7fa4

Exec Context: e0fecbda-d8aa-4e46-b859-2a433734a21b
    Exec Options:  { verbose: true, output: 3 }
    Exec Command: sudo modprobe v4l2loopback video_nr=50 card_label="Mon2Cam"
    Exec Command Splits:  [sudo,modprobe,v4l2loopback,video_nr=50,card_label="Mon2Cam"]
    Exec Result:  { code: 0, success: true },
 output: ""
Exec Context: e0fecbda-d8aa-4e46-b859-2a433734a21b

DEBUG Exiting
DEBUG V4L2 device created with id 50
PANIC Failed to create V4L2 device with id 50```

[ShayBox]

Something else is using v4l2loopback on your system, you'll have to close whatever that is so it can unload and load the kernel module

Probably Droidcam or something similar

[PalanixYT]

have you updated your kernel headers?