@jasperruijsink When you connect a cable, you get an automatically assigned link local IP address, starting with 169.254. The DHCP server, typically running on a router, is then going to assign an available IP address to the hub. If it has no available IP address (i.e. it has run out of addresses) or otherwise doesn't give the hub one, the hub will stuck with its link local IP address.
The Hub LR runs https://github.com/NetworkConfiguration/dhcpcd, which is one of the most commonly used DHCP clients and should work with most routers or DHCP servers.
If nothing works, I suggest you to try another router, or factory reset the router and/or the Flic Hub.