802.1x Authentication problem on HP ProCurve Switch 2848

[TauseefKhan]

Hi,

I have configured this switch to use 802.1x authentication and on some of the ports, I am receiving the following messages (802.1x: Invalid VLAN '0' supplied for port 18) which makes that port not to work anymore. I have tested the ports with different end devices (mac, linux and windows) but none of them works while the same devices works with 802.1x on the other ports on this same switch. I am using the following configurations for radius. We have not configured our radius server to assign any VLANs to the switch's ports and I think that the switch should move the ports to the configured VLANs once the authentication is successful.

aaa authentication port-access eap-radius
radius-server host "Radius Server IP" key "My Encryption Key"
aaa port-access authenticator 18,23,32
aaa port-access authenticator 23 unauth-vid 850
aaa port-access authenticator active

---- Reverse event Log listing: Events Since Boot ----
I 08/10/17 11:17:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:16:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:16:03 ports: port 18 is now on-line
I 08/10/17 11:16:03 ports: port 18 is Blocked by STP
I 08/10/17 11:16:03 ports: port 18 is Blocked by AAA
I 08/10/17 11:15:58 ports: port 18 is now off-line

Moreover, when I leave that port connected, the following information messages are recorded in the logs of the switch.

I 08/10/17 11:35:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:34:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:33:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:32:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:31:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:30:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:29:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:28:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:27:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:26:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:25:35 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:24:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:23:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:22:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:21:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:20:34 802.1x: Invalid VLAN '0' supplied for port 18
I 08/10/17 11:19:34 802.1x: Invalid VLAN '0' supplied for port 18