Button with hyperlink not working

Hello, I'm trying to add a button with an hyperlink to a page on my website to the last frame (the animation is programmed to stop after the last frame) of an HTML5 Canvas animation; when I try the animation in preview the link just works fine, but when I publish it it does not work. What am I missing? Here's the code I added to the action timeline at the last frame:

this.button_1.addEventListener("click", fl_ClickToGoToWebPage);

function fl_ClickToGoToWebPage() {
window.open("https://www.soildao.org/onepager.pdf", "_blank");
}
this.stop();