Problem with boot.ipfire.org on Core 69 development build

Hi all, i want to report a problem with the Development Build: next/b3acd7b8-dirty of Core 69. I have tried the boot.ipfire.org section but the following error appears.

IPXE initialising devices... OK IPFire boot server (boot.ipfire.org) IPXE 1.0.0+ --open source Network Boot firmware - http://ipxe.org

Waiting for link -up on net to... failed Permission denied (http://ipxe.org/o227603x) Could not configure net0: permission denied (http://ipxe.org/o227603x)

Reboot and Select proper boot device.....

Greetings

Erik