Linked Page In Menu Item

Site URL: http://www.lopezislandgrange.org/store

I made the Store menu item on our website link to our Square store. The issue is that when I give out the URL as above oursite.org/store) I get a 404 error. From there, they can see the menu item Store and click to it  and it will go to the Square Store. I'd rather not have the 404 error. Giving our direct link in an easy to remember way (oursite.org/store) is way easier to remember then the Square URL and sometimes I have to write it out i.e. physical posters.  Is there a way to have the oursite.org/store go directly to the store without a 404 error? Did I miss a setting?

You can create a blank Store Page with url /store

then add this code to Store Page Settings > Advanced > Header

<script>
         setTimeout(function(){
            window.location.href = 'https://lopez-island-grange-1060.square.site/s/shop';
         }, 1000);
</script>