Nvidia control panel is useful to run the Graphics drivers, display drivers, and graphics card to run smoothly and work properly in the background.
But, there is not a worry about this issue. You can easily resolve this error, by doing these changes:
1) Check your drivers properly.
2) Restart your Nvidia panel.
3) Check your graphics drivers
4) Check for the updating of drivers.
If you want some detailed information, then here are the instructions, that you should know:
https://worldzo.net/nvidia-control-panel-not-showing-in-windows-10/