Aura H2O No internet connection new Kobo

Hi. Yesterday I got a new Kobo Aura H2O. Nice to have, but one problem can’t be solved: Wi-fi connection. I can’t pass the initial setup after a basic and factory reset, due to earlier Wi-fi problems.

My home Wi-fi situation is very good and all my devices are running smoothly on the Netgear Nighthawk AC1900 R7000.
Router information:
WPA2-PSK secured
3 devices 2,4G wireless,
1 device 5G wireless,
1 device wired
Firmware version V1.0.7.12_1.2.5

Wireless settings:
2,4 Ghz
Region Europe
Channel auto (13)
Mode Up to 600 Mbps
Wireless AP On
Broadcast Name on
Wi-Fi Protected Setup Configured

5 Ghz
2,4 Ghz
Region Europe
Channel 36 + 40+ 44 (P) + 48
Mode Up to 1300 Mbps
Wireless AP On
Broadcast Name on
Wi-Fi Protected Setup Configured

Do you have an idea to solve this annoying problem? Thanks for replies!