From this article: https://support.microsoft.com/en-us/windows/camera-app-shows-error-0xa00f4244-nocamerasareattached-05d738b3-b1fd-06f2-f5fc-c0437ff8db32
Camera app shows error "0xA00F4244 NoCamerasAreAttached"
The error 0xA00F4244 NoCamerasAreAttached is often associated with issues with the camera driver. If the camera driver is outdated or corrupted, it might not communicate properly with the camera hardware.
Resolving this issue can often be as straightforward as updating the camera driver.
The Windows Camera troubleshooter in the Get Help app is another useful tool. It contains automated steps that can resolve most camera-related issues.
However, if the troubleshooter is unable to rectify the problem, use the following options to try to fix the problem:
Use Windows Update to update the driver
Switch the camera driver to the USB Video Device driver
Download and install an updated driver from manufacture's website