wireGuard setup block IP of the server

When we setup a wireguard VPN config, it does not work. What we have noticed that we can not even ping the server from the router when the settings is enabled. When we disable vpn the settings we can ping again the server IP.

We have tried with both latest version:

RUT9M_R_00.07.16.3_WEBUI.bin

RUT9M_R_00.07.15.4_WEBUI.bin

Router is brand new. We have already setup more than 50 routers the same way, and it was working always without a problem.

RUT901, batch no 024.

What could be the problem?

Thanks

Hello,

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Thank you,
M.