Liquid syntax error: Unknown tag 'set'

<section class="top-section nav-top-margin default-top-breadcrumbs">
  <div class="container">
    <div class="row">
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        <nav style="--bs-breadcrumb-divider: '›';" aria-label="breadcrumb">
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            <li class="breadcrumb-item active" aria-current="page"><span>Confirmation</span></li>
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  <section id="cart-header">
    <div class="container">
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        <div class="col-xs-12">
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<div id="cart-widget-checkout" data-domain="https://ertgodis.wm3.se/"></div>

<script>
  const waitForCompleteOrder = (() => {
    let queue = []

    function connectCart() {
      if (typeof Cart === "undefined") {
        console.log("Cart is undefined, retrying in 500ms")
        setTimeout(function() {
          connectCart()
        }, 500)
      } else {
        console.log("Cart is defined, subscribing to cart")
        Cart.subscribe(subscriber)
      }
    }

    function subscriber(action) {
      switch (action.tag) {
        case "orderStateIs":
          if (action.order.head.state === "complete") {
            if (queue.length > 0) {
              console.log("Order is complete, taking action")
              queue.forEach(fn => fn(action.order))
              queue = []
            }
          } else {
            console.log("Order is not complete, no action taken")
          }
          break
      }
    }

    function enque(fn) {
      if (typeof Cart === "undefined") {
        console.log("Cart is undefined, enqueuing function")
        queue.push(fn)
      } else {
        const order = Cart.order()
        if (order && order.head.state === "complete") {
          console.log("Order is already complete, taking action")
          fn(order)
        } else {
          console.log("Order is not complete, enqueuing function")
          queue.push(fn)
        }
      }
    }

    console.log("start waiting for order")
    connectCart()
    return enque
  })()

  waitForCompleteOrder(order => {
    console.log("Order is complete, sending data to Google Analytics")

    const order_cart_total = order.head.itemTotal.totalPrice - order.head.itemTotal.taxPrice
    console.log("order", order)
    const items = []

    for (let i = 0; i < order.items.length; ++i) {
      const itemDisc = order.items[i].originalPrice - order.items[i].price.totalPrice
      const distExist = itemDisc > 0 ? itemDisc : 0
      items.push({
        item_id: order.items[i].sku,
        item_name: order.items[i].name,
        affiliation: "Klippkungen",
        discount: distExist.toString(),
        currency: 'SEK',
        price: order.items[i].price.totalPrice.toString(),
        quantity: order.items[i].quantity.toString()
      })
    }
    console.log("items", items)
    console.log("data", dataLayer)
    dataLayer.push({ ecommerce: null })  // Clear the previous ecommerce object.
    dataLayer.push({
      event: "purchase",
      ecommerce: {
        transaction_id: order.head.number,
        value: order_cart_total.toString(),
        tax: order.head.itemTotal.taxPrice.toString(),
        shipping: order.head.shipmentTotal.totalPrice.toString(),
        currency: 'SEK',
        discount: order.head.discountTotal.totalPrice.toString(),
        items: items
      }
    })
    console.log("data2", dataLayer)
  })
</script>

<script>
  (function() {
    var waitForOrder = function() {
      if (typeof Cart === "undefined") {
        setTimeout(waitForOrder, 500)
      } else {
        function c(t) {
          for (var n = document.cookie.split("; "), r = 0; r < n.length; r++) if (p = n[r].split("="), p[0] == t) return p[1]
          return ""
        }

        var order = Cart.order()
        if (order) {
          var order_cart_total = order.head.itemTotal.totalPrice - order.head.itemTotal.taxPrice
          adrecord = {
            "programID": 911,
            "orderID": order.head.number,
            "orderValue": order_cart_total,
            "currency": 'SEK',
            "couponCode": order.head.campaignCode,
            "trackID": c("trackID"),
            "source": c("source")
          }
          var e = document.createElement("script")
          e.src = "https://track.adrecord.com/track.js"
          var s = document.getElementsByTagName("script")[0]
          s.appendChild(e)
        } else {
          setTimeout(waitForOrder, 500)
        }
      }
    }
    waitForOrder()
  })()
</script>

<img src="https://www.pricerunner.se/track/pixel/73537" width="1" height="1" style="display:none" alt="Pricerunner" />


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                 alt="Krona" loading="lazy">
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      <div class="footer-nav-links d-flex justify-content-center align-items-center text-white"></div>
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<div class="d-none">
  <div id="cart-widget-debug" data-domain="https://ertgodis.wm3.se"></div>
</div>

<script src="/js/cart-widget-full.min.js"></script>

</body>

<script>
  $('.cart-widget-action').click(function () {
    dataLayer.push({
      event: "add_to_cart",
      ecommerce: {
        currency: "SEK",
        value: '' + $(this).attr('data-price') + '',
        items: [
          {
            item_id: '' + $(this).attr('data-variant') + '',
            item_name: "" + $(this).attr('data-name') + "",
            affiliation: "Klippkungen",
            price: '' + $(this).attr('data-price') + '',
            quantity: '' + $(this).closest('.product-buy').find('.order_item_quantity').val() + '',
          }
        ]
      }
    });
  })

</script>


<script>
  /*
    This script is to track purchases for the AI-recomendation API.

  */

  Cart.subscribe(observeCartWidgetStates)

  function observeCartWidgetStates(data) {
    switch (data.tag) {
      case "orderStateIs":
        handleOrder(data);
        break;
    }
  }

  function handleOrder(data) {
    if (data.order.head) {
      const currentOrderState = data.order.head.state;

      if (currentOrderState === 'complete') {
        // Send request to the api
        const productIds = data.order.items.map(item => item.id);
        const variantIds = data.order.items.map(item => item.variantId);
        const prices = data.order.items.map(item => item.originalAmount.totalPrice);
        const storeId = "413";

        window.recEnginePurchase(storeId, productIds, variantIds, prices);

      }
    }

  }
</script>


<script>
  if (!$('body').hasClass('admin')) {
    console.log('locale', locale, shopCurrency);
    if (locale == 'sv') {
        if (shopCurrency != 'SEK') {
            document.location.href = '/sv/?country=SE&currency=SEK';
        }
    } else if (locale == 'fi') {
        if (shopCurrency != 'EUR') {
            document.location.href = '/fi/?country=FI&currency=EUR';
        }
    } else if (locale == 'da') {
        if (shopCurrency != 'DKK') {
            document.location.href = '/da/?country=DK&currency=DKK';
        }
    } else if (locale == 'no') {
        if (shopCurrency != 'NOK') {
            document.location.href = '/no/?country=NO&currency=NOK';
        }
    }
}

</script>

</html>