Exporting Storyline variables to Google Sheets

Hi lemidadigital​ rather than using jQuery which is redundant in this instance, you can use native JS to complete the same function:

console.log("JavaScript from Trigger is running!");
var player = GetPlayer();

document.addEventListener("DOMContentLoaded", function () {
  fetch("https://script.google.com/macros/s/.../exec", {
    method: "POST",
    headers: {
      "Content-Type": "application/json"
    },
    body: JSON.stringify({
      "FullName": player.GetVar("FullName"),
      "Quiz1.ScorePercent": player.GetVar("Quiz1.ScorePercent"),
      "Quiz2.ScorePercent": player.GetVar("Quiz2.ScorePercent"),
      "Quiz3.ScorePercent": player.GetVar("Quiz3.ScorePercent"),
      "Quiz4.ScorePercent": player.GetVar("Quiz4.ScorePercent"),
      "Quiz5.ScorePercent": player.GetVar("Quiz5.ScorePercent"),
      "Quiz6.ScorePercent": player.GetVar("Quiz6.ScorePercent"),
      "Quiz7.ScorePercent": player.GetVar("Quiz7.ScorePercent"),
      "Quiz8.ScorePercent": player.GetVar("Quiz8.ScorePercent"),
      "Quiz9.ScorePercent": player.GetVar("Quiz9.ScorePercent"),
      "Quiz10.ScorePercent": player.GetVar("Quiz10.ScorePercent"),
      "Quiz11.ScorePercent": player.GetVar("Quiz11.ScorePercent"),
      "Quiz12.ScorePercent": player.GetVar("Quiz12.ScorePercent")
    })
  })
    .then(response => response.json())
    .then(data => {
      console.log("Data sent successfully:", data);
    })
    .catch(error => {
      console.error("Error sending data:", error);
    });
});

return false;

FYI: I haven't checked your script, but have just converted to use native JS so you do not need to load in any external JS libraries like JS, which is where the "$" related error is stemming from.