After to uHTTPd admin page and point to newly generated cert and private keys and save and apply it tries to apply it but it reaches timeout (30 secs) then rolling back.
Tried that also many still times out and rolls back the changes.
I was actually able to figure out how to do via command line (uci set ...) and was able to make the changes stick (or persistent) and also did several reboots for good measure. Unfortunately LuCI now inaccessible. :frowning_face