After I upgraded both my CSS326-24G-2S+ switches to the 2.8 firmware now I cannot access the web UI. Of every 4 ping attempts, one would respond back. If I constantly refresh my browser, the web UI does come up for a split second until it errors out saying connection was lost. How can I fix the web UI?

Unplug your power. and plug it back.

Already tried that 3 times, waiting increasingly amounts of time 30 sec, 5 mins and 30 mins. Still no access to the gui.

Already tried that 3 times, waiting increasingly amounts of time 30 sec, 5 mins and 30 mins. Still no access to the gui.

After upgrade to v2.8, switch goes from "static IP" to "DHCP with fallback", - looks like a bug.
so put DHCP server on top of swtich and use that dynamic assigned IP to back to Static IP

After upgrade to v2.8, switch goes from "static IP" to "DHCP with fallback", - looks like a bug.
so put DHCP server on top of swtich and use that dynamic assigned IP to back to Static IP

Not a bug. That's the way it's designed.