Guest Wifi and OpenVPN

Hello,
tried to configure Guest Wifi, but seem that it broke OpenVPN (configured via foris). Client is connected, but no traffic (cannot ping turris LAN IP). When Guest-wifi is again disabled in foris (both in Wifi and LAN sections), OpenVPN is again operational.
I have old blue Turris,

I have no more time to investigate details yet.

Hello,
please check your IP pool in your OpenVPN and guest LAN.
Address ranges may not overlap or be identical.

Hi,
ranges was different - 10.111.111.0/24 for OpenVPN and 10.111.222.0/24 for Guest Wifi

Hi,
please send complete diagnostic to info@turris.cz