Are you unable to watch the camera on your Nest Hub Max from your phone or other device? Or are you unable to watch one of your other cameras on your Nest Hub Max?
Have you tried temporarily moving your Nest Hub Max to another location that is nearer to a Wi-Fi access point, just to test out whether your issue(s) are caused by Wi-Fi signal strength. (We have no issues with our Nest Hub Max.)
This is not the experience we want you to have, let me help you. A few questions: which Nest speakers are we working with? When did your issue begin? Was it working before? Were there any recent changes made?
Have you tried the steps provided by MplsCustomer? How was it?
It would help a lot if you could do a sequential reboot first:
Looking forward to your response so that we can isolate your concern. That way, we would know what steps to take.