Floodlight cam 2k can't connect to wifi during setup

Dear all,

Bought some years ago 5 Eufy Floodlights. Installed 4 of them and they’re working fine. Today I unpacked the 5th one and really can’t connect it to my wifi. During the setup…by adding the cam. Tried several router setups, even a mobile hotspot…the cam don’t want to connect to wifi.

Please do you have any ideas?

Thanks in advance!