I ran into similar issues when I didn’t have good connections between the pins on the camera and my breadboard. Make sure whatever cable harness connection you have is really well connected, and try power cycling the camera after exiting XCTU or the LS-Y201 and then re-entering the program. It’s a bit of a hassle, but with the loose connection, that was how I was able to determine the camera was actually taking pictures and transmitting the data properly.
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