Wifi problem with Keenetic Hopper DSL and Pixel 9 Pro XL

[Stefano]

Good morning everyone,
I installed Keenetic Hopper DSL a few days ago (I have an FTTC fiber with Postemobile).
I have about 40 devices connected, including smartphones, PCs, home automation.
Everything is fine, but I have a problem with the Pixel 9 Pro XL, it connects to the wifi network, but the phone reports limited connectivity problems, and in fact it doesn't go online.
I should point out that before the Keenetic I had Google Wifi Pro routers, and I didn't have any problems.
Yesterday my brother also installed the Keenetic Hopper DSL, and he also has the exact same problem (he has the Pixel 9 Pro XL).
What could it be? Do I need to make any changes to the router-side configuration?
Can you help me?
Thanks
Stefano

[Le ecureuil]

You can try to play with the WiFi settings - try to lower supported standard (for example enable only 11n), try to completely disable 5 Ghz band, try to fallback to WPA2 or even to WPA1 encryption.

If you find what settings makes such a trouble - please make us know.

[Stefano]

problem solved, it was the VPN