Call to a member function isTranslatable() issue fixed

src/Element/LayoutBuilder.php

@@ -136,6 +136,9 @@ final class LayoutBuilder extends CoreLayoutBuilder {
         'uuid' => $uuid,
       ],
     ];
+
+    $component = $section->getComponent($uuid);
+    if ($component !== null) {
     if (static::isTranslation($section_storage)) {
       $contextual_group = 'layout_builder_block_translation';
       $component = $section->getComponent($uuid);
@@ -165,6 +168,9 @@ final class LayoutBuilder extends CoreLayoutBuilder {
         'operations' => 'move:update:remove',
       ];
     }
+    } else {
+        return null;
+    }
     return [
       $contextual_group => $contextual_link_settings,
     ];