diff --git a/client/src/includes/previewPlugin.ts b/client/src/includes/previewPlugin.ts
index d708e363c2..6258cff4a3 100644
--- a/client/src/includes/previewPlugin.ts
+++ b/client/src/includes/previewPlugin.ts
@@ -34,7 +34,7 @@ export const wagtailPreviewPlugin: AxePlugin = {
       // Inside the preview frame, only call the expected plugin instance method.
       // eslint-disable-next-line no-underscore-dangle
       const pluginInstance = this._registry[id];
-      pluginInstance[action].call(pluginInstance, options, callback);
+      pluginInstance?.[action].call(pluginInstance, options, callback);
     }
   },
   commands: [