[JuanStone]

A string for the final format and another for the local format, perhaps that is the mistake, even-i have my doubts because the format you've done in the end, this should work.

pawn Код:

CMD:credits(playerid, params[])
{
    new string[55], format[39], pName[24];
    GetPlayerName(playerid, pName, 24);
    format(format, sizeof(format), "***your name %s.", pName);
    
    strcat(string, "Hey\n");
    strcat(string, "\n");
    strcat(string, "\n");
    strcat(string, format);
    ShowPlayerDialog(playerid, DIALOG_CREDITS, DIALOG_STYLE_MSGBOX, "{F81414}Credits", string, "Ok", "");
    PlayerPlaySound(playerid, 1183, 0, 0, 0);
    return true;
}