Diagnosis
The camera is losing its connection to your WiFi router, which is the most common gripe with this model. It's usually a signal strength or network congestion issue, not a broken camera.
How to Fix It
First, power cycle both the camera and your router. Unplug the camera and your router, wait 30 seconds, plug the router back in, wait for it to fully boot, then plug the camera in. Let it reconnect. If it's still flaky, move the camera closer to your router or, better yet, get a WiFi extender. The Arlo Baby is notoriously sensitive to weak signals.
If That Didn't Work
Your router might be using a congested channel. Log into your router's admin settings (usually through a web browser) and try switching the 2.4GHz band to channel 1, 6, or 11. The Arlo Baby only works on 2.4GHz, so that's the band you need to optimize.
Heads Up
If you have a mesh network system, sometimes the camera will try to hop between nodes and drop out. Try temporarily disabling the mesh feature or assigning the camera to a single node if your system allows it.