Syntax error in gsc studio

[Bloopd0g]

A month or two ago me and my wife were trying to play zombies together, though she has always used a controller. I found an aim assist script and cobbled it together for it to only work for her all the time. I changed pc's and somehow lost the original script that I had compiled and that had worked in gsc studio, and now im back to having a syntax issue. I remember having the same issue when I first attempted this, but I do not remember how I solved it.

#include maps/mp/_utility;
#include common_scripts/utility;
#include maps/mp/gametypes/_hud_util;
#include maps/mp/gametypes/_hud_message;
#include maps/mp/zombies/_zm_perks;
#include maps/mp/zombies/_zm_utility;
init()
{
	level thread onplayerconnect();

}

onPlayerConnect()
{
	level endon("end_game");
    for(;;)
    {
        self waittill_either( "spawned_player", "player_revived" );
        
        if (player.name == "Taternastee")
        {
              player thread AimAssist();
        }   else	{
        return(0);
        
}
}


 			
 			
 			AimAssist() ///IT SAYS THIS LINE HAS BAD SYNTAX-------------------
{
	self endon( "disconnect" );
	self waittill( "spawned_player" );
	flag_wait( "initial_blackscreen_passed" );
	self thread is_player_aiming();
	view_pos = self getweaponmuzzlepoint();
	zombies = get_array_of_closest( view_pos, getaiarray( level.zombie_team ), undefined, undefined, undefined );
	range_squared *= 300;
	i = 0;
	while( i < zombies.size )
	{
		if( !(isalive( zombies[ i] ))isalive( zombies[ i] ) )
		{
			continue;
		}
		enemy_origin = zombies[ i].origin;
		test_range_squared = distancesquared( view_pos, enemy_origin );
		if( test_range_squared < range_squared )
		{
			if( zombies[ i] player_can_see_me( self ) )
			{
				while( !(self.isaiming)self.isaiming && !(self isreloading()) )
				{
					self setplayerangles( vectortoangles( zombies[ i] gettagorigin( "j_spine4" ) - self geteye() ) );
					while( self adsbuttonpressed() )
					{
						wait 0.05;
					}
				}
			}
		}
		i++;
	}
	wait 0.05;
	?;

}
player_can_see_me( player )
{
	playerangles = player getplayerangles();
	playerforwardvec = anglestoforward( playerangles );
	playerunitforwardvec = vectornormalize( playerforwardvec );
	banzaipos = self.origin;
	playerpos = player getorigin();
	playertobanzaivec -= playerpos;
	playertobanzaiunitvec = vectornormalize( playertobanzaivec );
	forwarddotbanzai = vectordot( playerunitforwardvec, playertobanzaiunitvec );
	if( forwarddotbanzai >= 1 )
	{
		anglefromcenter = 0;
	}
	else
	{
		if( forwarddotbanzai <= -1 )
		{
			anglefromcenter = 180;
		}
		else
		{
			anglefromcenter = acos( forwarddotbanzai );
		}
	}
	playerfov = getdvarfloat( "cg_fov" );
	banzaivsplayerfovbuffer = getdvarfloat( "g_banzai_player_fov_buffer" );
	if( banzaivsplayerfovbuffer <= 0 )
	{
		banzaivsplayerfovbuffer = 0.2;
	}
	playercanseeme = ( anglefromcenter <= playerfov ) * ( 0.5 * ( 1 - banzaivsplayerfovbuffer ) );
	return playercanseeme;

}

is_player_aiming()
{
	self.isaiming = 0;
	for(;;)
	{
	aiming = 0;
	self.isaiming = 0;
	while( self adsbuttonpressed() )
	{
		aiming++;
		if( aiming > 1 )
		{
			self.isaiming = 1;
		}
		wait 0.05;
	}
	wait 0.05;
	}

}

 if ( getDvarInt( "players_keep_perks_permanently" ) == 1 )
    {
        if ( !is_true( self._retain_perks ) )
        {
            self thread watch_for_respawn();
            self._retain_perks = 1;
        }
    }
}

though I do remember it was a relatively simple thing that I somehow figured out on my own from my own forgotten coding knowledge.
Also If anyone can figure it out, can someone kindly add a way to make the players always have infinite sprint with staminup and mule kick.