at line 295 theres a bug if u have multiple gameservers running with server identiy.

L295:

 protected override void LoadDefaultConfig()
        {
            Config.WriteObject(GetDefaultConfig(), true, "oxide/config/Tebex.json");
        }

i changed it to this :

protected override void LoadDefaultConfig()
        {
            Config.WriteObject(GetDefaultConfig(), true, ConVar.Server.rootFolder+"/oxide/config/Tebex.json");
        }

Thanks for sharing your solution, we'll ensure this is fixed in the next update.