1. Close any other tabs or apps you may have open that are using your camera
2. Close other tabs running Google Meet
3. Remove Grid View Extension and Manage Extensions
4. Update your Chromebook
5. Reset your Chromebook
6. Try Guest Mode
7. Try a different device (Android phone, iPhone, or a different computer)

If your Google meet is just spinning and you have tried the above steps, then your webcam might be malfunctioning. Additional support is required.