Hello isa2410,
That particular icon indicates that there is another application utilizing the camera when you try to use the EOS Webcam Utility Software. An error screen may also appear when using the EOS Webcam Utility software with the EOS-1DX, EOS 5D Mark III or EOS 6D camera if the media card is not inserted.. Please confirm that the media card is inserted in the camera.
We would recommend exiting and closing any applications that may be running on your computer, or in your task tray that may be connected to your camera, or using the camera’s LiveView video signal. For example: Canon's EOS Utility or an application connected to the camera like another video conferencing app. When you connect the camera, there is an icon in the top right corner of your computer screen for EOS Utility if you're using a MAC computer. Make sure that you close that. It will keep the Webcam Utility from connecting to the camera.
