if that happens, how can you make it work again? Just wait for a while and then it will automatically recover? Since it says no internet connection, are you sure by that time if the camera is online？

Check Antivirus altert history, is anything related being blocked? Try disable Antivirus. Can you still ping the camera from your phone or computer when you cannot access internally? To further...

Devices like your computer, thermostat will not leak password. They are your own devices. You can trust them. As for those unknown devices, you can block them.

是的

It seems that error should not happen when using WPS. Something is wrong but I don't know what it is. You can contact the tplink tec support directly. Take a picture of the error and send it to them....

If the main Deco is still green, it should work even though the 2nd deco is red. Did you reset the 2nd deco? Push the reset button underneath for 1s to reset it. Wait unitl the light turns blue then...