If you press Ctrl+C with your current-time indicator where it is in your screenshot, then what do you expect to be copied? No keyframe is selected.
To copy a keyframe, a keyframe must be selected.
Details on all the ways to select keyframes are here:
Thanks. There was a lag so I didn't noticed it. I try to copy keyfremes from many layers and paste it in a good place. But that was not work correctly.