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After IP change unable to access Web GUI with new IP, ran config network webmode enable and config network secureweb enable neither command has any effect.
Did you just change the IP 20.4 to 20.8, or did you change the VLAN as well?
IF you changed the VLAN, make sure you update the native VLAN on the switchport if you have it set to untagged.
Finally, did you reboot?
Just a ip address change, vlan remains the same,
rebooted muliple times once with web disabled and others web enabled, still nothing
device always pings
Update: I reentered the managment IP infomation as before and this time the web GUI started working
you put in the old information or rewrote the new information?
with the new information, if you do a show arp, does it show the correct information?
Can you post the output from show interface summary, both new and old IPs?