HBO Max (now "Max") - won't work through Cox

Today (5/23/2023) is the Big Day and HBO Max is now "Max". And now I have lost access to Max. Attempting to log in through the Max web page returns either a 404 error or a message that Max is not supported through Cox. Attempting to open the old HBO app on my Roku tells me I need to upgrade. I install the new upgrade and my only log in options are to open a new subscription.  If Cox doesn't support Max, then I will cancel my HBO subscription.

Several emails from HBO Max over the past week promised a "seamless" upgrade - just continue to watch your favorites as before. So much for that promise.