Nexx WT3020 with OpenWrt 18.06 no internet connection on Wireless

hi guys,
I installed OpenWrt on my Nexx WT3020, the ethernet connection works fine, I find with my mobile the SSID of the wireless BUT it say there isn't internet connection on the Wi-fi.
What's Happen?

Do you see connected clients in Luci?

yes I see my device on " Associated Stations" but no connection. What's happen???

I try now,
with my mobile I haven't internet connection BUT with my Pc Portable I've connection with LAN and Wi-Fi.

Nobody can help me???

Can you ping gateway from wireless device?