Please make sure you have a Allow Loopback firewall rule (for both 127.0.01 and ::1). A Trusted Application might work, but it only allows outbound traffic (does not automatically allow inbound traffic).
KB71230 - Host Intrusion Prevention 8.0 Loopback traffic blocked when firewall is enabled
Thank you for the reply Kary.
The Allow Loopback firewall rule is already configured. - ::1 and 127.0.0.1 are specified within the rule.
The Allow Loopback rule is pre-defined with Host IPS 8.0. I did not need to toggle/create this rule.I find it weird that I was seeing the loopback blocking before i removed the "Block IPv6" from the Firewall Rules.
Regardless, I do not see loopback blocking anymore. I'm only seeing errors like the one I linked in my first screenshot.
I can't see the entire firewall entry there, but if it's Inbound traffic being blocked, the Trusted Application rule will only allow Outbound-initiated traffic out. It does not automatically allow Inbound-initiated traffic in (it will allow traffic In via an Outbound connection, since the firewall is stateful).