Thank you for reaching out to Alfred!
You see your Camera offline when it has been powered down, disconnected, logged out, or simply crashed. If you see a yellow circle, please tap on it to see if the Camera can be woken up. If that fails, the only way to bring it back online is regaining physical access to the device. Please run a quick Camera Health Check to see if the power supply/connection can be improved: How Is Your Camera Doing? Do the Camera Health Check!
Also, please avoid pressing home button or power key after you set up Camera in the future. Instead, you can tap the Lock icon on the bottom right corner.
For more info about connectivity problems, please read:
Hope it helps!