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Closes #3413254

src/SectionLibraryRender.php

@@ -79,10 +79,10 @@ class SectionLibraryRender implements TrustedCallbackInterface {
           ];
         }
         // Add save to library link to the built section.
-        elseif (isset($section['configure']) && isset($section['configure']['#url'])) {
-          $params = $section['configure']['#url']->getRouteParameters();
+        elseif (isset($section['section_links']['configure']) && isset($section['section_links']['configure']['#url'])) {
+          $params = $section['section_links']['configure']['#url']->getRouteParameters();
           // Pop the last item to add the link before it.
-          $last_item_section = array_pop($sections[$key]);
+          $last_item_section = array_pop($sections[$key]['section_links']);
           $add_to_library_url = Url::fromRoute(
             'section_library.add_section_to_library',
             [
@@ -102,14 +102,14 @@ class SectionLibraryRender implements TrustedCallbackInterface {
               ],
             ]
           );
-          $sections[$key]['add_to_library'] = [
+          $sections[$key]['section_links']['add_to_library'] = [
             '#type' => 'link',
             '#title' => t('Add to Library'),
             '#url' => $add_to_library_url,
             '#access' => $add_to_library_url->access(),
           ];
           // Push the last item again.
-          array_push($sections[$key], $last_item_section);
+          array_push($sections[$key]['section_links'], $last_item_section);
         }
       }