If Lightroom Classic doesn't capture photos consistently during tethered shooting, the application could have lost the connection to the camera. To get tethered shooting working again, perform the following steps in the order presented.
If you are on macOS Catalina, make sure that you update to macOS 10.15.3 or later. Tethering was broken in earlier versions of macOS Catalina.
In Lightroom Classic, choose Help > Check For Updates:
If you are running Lightroom 6 perpetual on a Windows machine, you may see an error message when you try tethered shooting for the first time. As a workaround, restart Lightroom and start tethering.
See Tethered camera support in Lightroom for a list of cameras that Lightroom Classic supports for tethered shooting. Make sure that your camera is supported both in the version of Lightroom Classic that you're using, and on the operating system that you're running.
After you know that you're running the latest version of Lightroom Classic and that it supports your camera, turn off the camera. Then, turn it back on and retry tethered shooting.
If turning the camera off and on doesn't work, try completely disconnecting the camera from the computer. Then, turn the computer off and on, and try tethered shooting again:
If you're using a long USB cable or a USB extension, try using a shorter USB cable, removing the USB extension, or using a powered USB hub.
Note: Adobe recommends using USB 2.0 or USB 3.0 SuperSpeed cable tethered capture.
Make sure that there is enough available space on the hard disk to hold all your imported photos.
Close Lightroom Classic and delete your Lightroom Classic preferences file. Then restart Lightroom Classic, connect the camera, turn it on, and retry tethered shooting.
Contact your camera manufacturer for more information.
Make sure that your camera manufacturer's capture or editing software isn't open. It could be trying to control your camera. After closing, retry tethered shooting in Lightroom Classic.
Check your camera's documentation for more information.
There have been issues with Nikon cameras when this Control Panel setting is set to view files or process images.
In the Adobe Community Help Search box at the top of this page, enter your camera's make and model, then press Enter (Windows) or Return (macOS) to see if there are any known issues or bugs with your particular camera and tethered capture. Follow any instructions provided in that document or that community members recommend.
If possible, try another application, such as your camera manufacturer's software, to capture photos from the tethered camera. If using another application works, contact Adobe tech support with the following information: