[Storm203]

Try this

pawn Код:

CMD:setadmin(playerid, params[])
{
    if(PlayerInfo[playerid][pAdmin] >= 1)
    {
        new targetid, level;
        new sendername[32], string[128];
        if(sscanf(params, "ui", targetid, level))
        {
            SendClientMessage(playerid, 0xFFFFFFFF, "Usage: /setadmin <playerid> <level>");
            return 1;
        }
        if(level > 5 || level < 0) { SendClientMessage(playerid, COLOR_GREY, "> Don't go below 0 or higher then 5!"); return 1; }
       
        if(IsPlayerConnected(targetid))
        {
            new ranktext[32];
            PlayerInfo[targetid][pAdmin] = level;
            if(level == 1) { ranktext = "Trial Admin"; }
            else if(level == 2) { ranktext = "Basic Admin"; }
            else if(level == 3) { ranktext = "Lead Admin"; }
            else if(level == 4) { ranktext = "Head Admin"; }
            else if(level == 5) { ranktext = "Owner"; }
            else { return 1; }

            
            GetPlayerName(playerid, sendername, sizeof(sendername));
            format(string, sizeof(string),"> Admin %s has promoted you to a %s", sendername, ranktext);
            SendClientMessage(targetid, 0xFFFFFFFF, string);
        }
    }
    else return SendClientMessage(playerid, 0xFFFFFFFF, "Only Admins can perform this action.");
    return 1;
}

Also, why all the return 1s? You only need to do it once, at the end, so that the script knows that it was a valid command.