Underscore not supported in SSID

I i would be happy to try different SSID settings if this was a regular router and not a wifi extender. Many of these extenders set the SSID themselves and don’t allow you to change it. They automatically add the _ext to the main SSID and that is supposed to work fine as long as all of your devices follow the wifi spec properly. However, in this case, wyze cameras do not.