changed code -> tiny change, actually done now

code.js

@@ -25,7 +25,7 @@ let scoreO = 0;
 let scoreCounterO = 100;
 let gameOver = false;
 let winner;
-let highScore;
+let highScore = 0;
 let allowHSCookies;
 let saveChoiceCookie;
 let somethingIsSelected = false;
@@ -450,9 +450,11 @@ function checkWinCondition(){
         } else if(allowHSCookies && parseInt(highScore) < scoreO){
             document.cookie = "highScore=" + scoreO + "; expires=Thu, 5 Dec 2030 12:00:00 UTC";
         }
+        if(allowHSCookies) {
             highScore = getCookie("highScore");
             document.getElementById("highScore").innerText = "Highscore: " + highScore;
         }
+    }
 }
 function score (field){
     if(field.piece === 0 && turnPlayer === "Player-Turn: X" && scoreCounterX > 10){