FIXED: I have my ISP modem/router Bridged to a separate router. This way the ISP modem/router is restricted to modem-only.
I created a static IP address for the router and placed inside a DMZ created on the modem.
Seems to working (for now)
Been playing D2 fine until last night. I cannot get past the character select screen because of the CHICKEN error.
Deleted my Steam download cache
Rebooted modem, router and pc
Turned off anti-virus and firewall
Deleted D2 and reinstalled
Same result using a VPN
Verified decent download/upload speeds
Nothing else seems affected but D2 is now bricked.
Any ideas on how this happened and how to fix?