Friend gets 10048 error

Hi!

I have tried ti make a server but when my friend tries to join it he gets 10048 error. We can join other servers fine but not the one I made. Does anyone know what to do to fix this?

Could you send a screenshot of his BeamMP launcher?

I’m not sure that I can. Of which part would you need it? He downloaded it yeasterday so should atleast be the correct version.

The terminal output (BeamMP launcher window) after he joins your server.