Gstnvarguscamerasrc.cpp, execute:521 No cameras available

[pigpigwar]

Hello, i have done that, but after that nano will not reboot.Any idea why ?

thanks JerryChang,
my problem solved,

cd ~/
sudo mv /lib/modules/4.9.140-tegra/ /lib/modules/4.9.140
sudo reboot

reboot is very important,
Without the reboot, the problem will not be resolved.
thanks

dont do what #3 say = =
you will not be able to open your jetson nano anymore if you change the file name
if you have already done the process above, you need another linux computer to change the file name back