OpenWrt AP in blue Network

I have installed / Upgraded to OpenWrt 22.03 on a TP-Link TL-WR1043ND v1
I followed the instructions from here in the section “Configuration via LuCI, the OpenWrt Web Interface”.
I have connected this AP in the blue network and all is working fine: the clients can use the AP and have also internet connection. Also a wired connection to the switch is working fine. All clients get an IP via DHCP.
I can connect to the GUI of the OPenWRT AP through its static IP in the blue network.
I have added the br-lan of the OpenWRT MAC in the section of IPFIRE to allow access.
However I can not update the opkd database. Also when I connect via ssh with the blue network to the AP and I a make a ping to I do not get a respone

The config og the lan interface of OPENWRT is

config interface 'lan'
        option device 'br-lan'
        option proto 'static'
        option netmask ''
        option ip6assign '60'
        option ipaddr ''
        option gateway ''
        option force_link '0'
        list dns ''

The blue network of IPFire is

However when I connect the OpenWrt AP to the Green network everything is fine and I can make a ping from the AP to

Where is the diffrence in this respect from blue and green?

Did you disable the MAC filter?

Yes I also disabled MAC for the whole

there is no ip6 in IPfire.

Meanwhile i chnaged to DHCP

config interface 'lan'
        option device 'br-lan'
        option proto 'dhcp'

so that all necessary settings come from IPFIRE
and this made no change