This script will repeatedly execute the script until it raises an error.
When it raises an erorr, it calls _llqw function. 
--------------------------------------------------------------------------
<script>
let b=1;
function _llqw(e){
	console.log("ERROR",e.message);
	b=0;
};

<?php echo $px["script"]; ?>

if(b){
	setTimeout(function(){
		location.reload();
	},100);
}
</script>

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To raise an error on purpose, use CKFunc.class.php
--------------------------------------------------------------------------
		// shuffle characters in the `remove` string
		$rx=array();
		for($i=0;$i<strlen($remove);$i++){
			if(1){  <------------------------------------Switch it to 0
				// correct version
				do{
					$idx=rand(1,100000);
					$b=isset($rx[$idx]);
					if(!$b){$rx[$idx]=$remove[$i];}
				}while($b);
			}else{
				// bug version
				// [DANGER] it may overwrite $rx item!!
				$rx[rand(1,100000)]=$remove[$i];
			}
		}
		ksort($rx);
		$remove="";
		foreach($rx as $idx=>$ch){
			$remove.=$ch;
		}
--------------------------------------------------------------------------