Sharing what worked for me.
Did the certificate upgrade and left for a trip and could not connect to the Web GUI.
Did a reboot and could connect but lost connection again when the array started.
SSH was working.
Tryed stopping all Docker containert, still no access.
Stopped the WM's, still no accesss.
Tryed use_ssl no, still no access.
Deleted all the files in /boot/config/ssl and rebooted, this gave me access to the Web GUI after reboot.