Controllerless Networks

Hello !
I have a scenario with 2 IAP 215. In the following SSID settings:

IAP IP address - VLAN 1
SSID ADM - Vlan 2
SSID GUEST - Vlan 12

Everything was running smoothly since installation (30 days ago). Today we had problem with one of the IAP. This was not delivering DHCP for SSID ADM and GUEST.
There was no change in the IAP or switch. The switch (HP) port which is connected with the AP this problem with the following configuration:

PVID: 1
Port link-type: trunk
VLAN passing: 1 (default vlan), 2, 12
VLAN permitted: 1 (default vlan), 2, 12

This is the same port configuration of another AP that is running fine.The IAP with problem this reporting the message attached.

How can I fix this problem believing that the settings are "correct"?

The error clearly hints to mismatch on native vlan. I am not an expert on HP switch but have you made sure that native VLAN on HP switch is 1?

Thank you for your help @mannvishal !

Yes, I'm sure ! Also because the configuration functioned normally and now returned to work.
If it was problem with the default VLAN, I could not access the IAP, as this is in VLAN 1 switch.
Now that the problem does not happen again, I do not know how I can find the cause of the problem.

Note: PVID is native Vlan.

Broadcast storm was causing the problem.

can you elaborate a little on how the storm was happening. thanks.