Blast from the past.
I get the exact same error on 2 of my cams. They are of course the same cameras that you have. My first foray into security camera setups was an LaView NVR and 8 of their cameras.
I ran that setup for about 4 years. About 2 years ago I moved over to BI. Most of my cameras I replaced, but I have 2 LaView cameras still in service and they behave exactly as you describe.
Although LaView helped me to cut my teeth in this field of interest, that NVR stuff is just so limiting when it comes to actionable video. As my needs went from “I have security cameras!” to “I can identify that perp!” I have never looked back to those days.