Plutonium

I am trying to open my Plutonium.exe but it gets me this error and then it tells me that I can only play in LAN mode when using VPN if it lets me play but on some servers it takes me out why i use VPN (thanks), a friend downloaded the game and did not require the use VPN or anything, he didn't have any errors, why did he do so well and I didn't?:D I already tried changing DNS and it didn't work for me, I don't want to play with VPN, please help me!:(