I don't know which camera you have or exactly what it is doing or not doing, but you cold try a restart, and if that doesn't resolve it, a factory reset, using the instructions here:
Thank you for bringing up the concern you're experiencing, I would love to look into this further for you. The first troubleshooting step that I'd recommend would be to restart your device. This process should keep all your settings, and reconnect it to the same Wi-Fi network. This is helpful if it ever freezes, has connection problems, or isn't working normally.
@Miriam0927 I'm dropping by to ensure that everything is covered here. How's it going with your Nest Camera? We wanted to know what is the light status of your Nest Camera? Were you able to read the information and check the links shared above? In case you have an update, you know where to find us.
I appreciate the help, MplsCustomer and Brad.