Basically on a system reboot the gui is blank.
Running the bellow command fixes it for a brief moment.
/usr/local/etc/rc.restart_webgui
I had this happen before and the only solution I came up with was a clean install. It fixed it for 3 months. Now it is back.
What should I do? How can I fix it? I am running this as a proxmox vm. It worked fine on past versions (the last three years).
Solution:
So my vm ran out of disk due to log files filling up the total capacity of my vm disk. Clearing the logs fixed it.