Problem localized anf solved. Old router with ip 192.168.8.1 was used as a Access Point and as a switch. After change his adress all network work with 192.168.8 area.

@terziyski dhcp adres in my router is synchronized with lan adres of router, i check it. Devices get a new ip from router, but no internet. There are all Dell laptops. I will try my Acer to connect...

@terziyski in my case when i change digit 0 to 8, laptops connects to router, gives a new ip, but no internet access. But my phone work with old and new adresses. When change back to 0.1 adress,...

I need chage router ip for internal Lan from 192.168.0.1 to 192.168.8.1 . After this change no iternet acces via wifi from router. What is wrong ? Not work for laptops with win10, my Motorola edge...