ACP2E-2015: Customizable Option Image link is broken

Author: bubasuma

app/code/Magento/Sales/Controller/Download/DownloadCustomOption.php

@@ -29,6 +29,8 @@ class DownloadCustomOption extends \Magento\Framework\App\Action\Action implemen
     /**
      * @var \Magento\Framework\Unserialize\Unserialize
      * @deprecated 101.0.0
+     * @deprecated No longer used
+     * @see $serializer
      */
     protected $unserialize;
 
@@ -106,7 +108,7 @@ public function execute()
             if ($this->getRequest()->getParam('key') != $info['secret_key']) {
                 return $resultForward->forward('noroute');
             }
-            $this->download->downloadFile($info);
+            return $this->download->createResponse($info);
         } catch (\Exception $e) {
             return $resultForward->forward('noroute');
         }

app/code/Magento/Sales/Model/Download.php

@@ -67,8 +67,22 @@ public function __construct(
      * @param array $info
      * @return void
      * @throws \Exception
+     * @deprecated No longer recommended
+     * @see createResponse()
      */
     public function downloadFile($info)
+    {
+        $this->createResponse($info);
+    }
+
+    /**
+     * Returns a file response
+     *
+     * @param array $info
+     * @return \Magento\Framework\App\ResponseInterface
+     * @throws \Exception
+     */
+    public function createResponse($info)
     {
         $relativePath = $info['order_path'];
         if (!$this->_isCanProcessed($relativePath)) {
@@ -80,7 +94,7 @@ public function downloadFile($info)
                 );
             }
         }
-        $this->_fileFactory->create(
+        return $this->_fileFactory->create(
             $info['title'],
             ['value' => $this->_rootDir->getRelativePath($relativePath), 'type' => 'filename'],
             $this->rootDirBasePath,