# Unexpected error after running Smart Action but all is fine

**URL:** <https://community.forestadmin.com/t/unexpected-error-after-running-smart-action-but-all-is-fine/4647>\
**Category:** Help me!\
**Created:** [May 7, 2022, 3:03pm UTC](https://community.forestadmin.com/t/unexpected-error-after-running-smart-action-but-all-is-fine/4647 "2022-05-07T15:03:47Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![nico\_lrx](https://dub1.discourse-cdn.com/flex013/user_avatar/community.forestadmin.com/nico_lrx/32/708_2.png) [@nico\_lrx](https://community.forestadmin.com/u/nico_lrx)\
**Post date:** [May 7, 2022, 3:03pm UTC](https://community.forestadmin.com/t/unexpected-error-after-running-smart-action-but-all-is-fine/4647/1 "2022-05-07T15:03:47Z")

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Hello Forest,  
I added a Smart Action to my Rails app. However, even if the code is running just fine, it displays the following error in the dashboard:

> Unexpected error with Generate Audio Url action.

Here is my code:

```javascript
def generate_audio_url
		quiz_question_id = ForestLiana::ResourcesGetter.get_ids_from_request(params).first
		quiz_question = QuizQuestion.find(quiz_question_id)
		if quiz_question.present?
			if quiz_question.question_type == "dictation"
				DicteesWorker::CreateAudioSampleWorker.perform_async(nil, quiz_question.id)
			end
		end

		render json: { success: 'Nous créons le fichier audio…' }
	end

```

I guess that’s something related to `render json`? What should I render so everything looks fine in the Forest Admin panel?

Thanks.

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<div class="post-metadata">

**Author:** ![anon15528774](https://avatars.discourse-cdn.com/v4/letter/a/35a633/32.png) [@anon15528774](https://community.forestadmin.com/u/anon15528774)\
**Post date:** [May 9, 2022, 7:01am UTC](https://community.forestadmin.com/t/unexpected-error-after-running-smart-action-but-all-is-fine/4647/2 "2022-05-09T07:01:17Z")

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Hello @nico_lrx 👋

Do you have any error in the browser’s console ? Can you share screenshots of the request’s payload and response (in Chrome: Developer tools \> Network \> the request sent when you trigger the Smart Action \> Payload and Preview) ?

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<div class="post-metadata">

**Author:** ![nico\_lrx](https://dub1.discourse-cdn.com/flex013/user_avatar/community.forestadmin.com/nico_lrx/32/708_2.png) [@nico\_lrx](https://community.forestadmin.com/u/nico_lrx)\
**Post date:** [May 9, 2022, 7:09am UTC](https://community.forestadmin.com/t/unexpected-error-after-running-smart-action-but-all-is-fine/4647/3 "2022-05-09T07:09:50Z")

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Hello @anon15528774,  
Thanks for your help. Apparently there is a CORS error. Maybe it’s related to Cloudflare?

Here are the screenshots :

 ![Capture d’écran 2022-05-09 à 10.07.03](https://europe1.discourse-cdn.com/flex013/uploads/forest/original/2X/d/deb062fa156be3badd9f2b1eb940f6a5467daffc.jpeg)  
 ![Capture d’écran 2022-05-09 à 10.08.05](https://europe1.discourse-cdn.com/flex013/uploads/forest/original/2X/0/0d60a1dd8565f347484d83f9c11cb66513bbe25d.jpeg)  
 ![Capture d’écran 2022-05-09 à 10.08.36](https://europe1.discourse-cdn.com/flex013/uploads/forest/original/2X/2/2eb7b757faa88675b82f72535b94b65cbce13320.jpeg)  
 ![Capture d’écran 2022-05-09 à 10.08.46](https://europe1.discourse-cdn.com/flex013/uploads/forest/original/2X/0/0cc80f7a10acfc4423a4c91fe85773d263829615.jpeg)

Thanks!

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<div class="post-metadata">

**Author:** ![anon15528774](https://avatars.discourse-cdn.com/v4/letter/a/35a633/32.png) [@anon15528774](https://community.forestadmin.com/u/anon15528774)\
**Post date:** [May 9, 2022, 7:18am UTC](https://community.forestadmin.com/t/unexpected-error-after-running-smart-action-but-all-is-fine/4647/4 "2022-05-09T07:18:11Z")

</div>

Thank you.

You need to [configure the CORS headers](https://docs.forestadmin.com/documentation/how-tos/setup/configuring-cors-headers).

Let me know if it works.

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<div class="post-metadata">

**Author:** ![nico\_lrx](https://dub1.discourse-cdn.com/flex013/user_avatar/community.forestadmin.com/nico_lrx/32/708_2.png) [@nico\_lrx](https://community.forestadmin.com/u/nico_lrx)\
**Post date:** [May 9, 2022, 7:45am UTC](https://community.forestadmin.com/t/unexpected-error-after-running-smart-action-but-all-is-fine/4647/5 "2022-05-09T07:45:58Z")

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Génial, ça fonctionne, merci !