Creator Hub — FetchError 400 on workflow submission + duplicate workflows impossible to delete

Questions
1

Hi everyone,

I’ve been experiencing a frustrating bug when submitting templates to the n8n Creator Hub.

What happens:
Every time I click “Submit” on a new workflow template, I get this error immediately:
There was a problem creating the workflow: FetchError: [POST] "https://api.n8n.io/api/workflows": 400

However, the workflow is actually being created server-side — I only realize this after refreshing. Because the UI keeps showing the error and stays on the same page, I ended up submitting multiple times, which created several duplicate workflows that I now cannot delete from the Creator Hub interface.

What I tried:

  • Multiple browsers (incognito included)
  • Cleared cache
  • Different networks
  • Logged out and back in
  • Cleaned the JSON (removed meta, pinData, active, versionId, credential IDs)

All attempts result in the same 400 error on the frontend, while the workflow gets created on the backend.

My setup:

  • Self-hosted n8n v2.0.3
  • Creator account: growthai

Questions:

  1. Has anyone else experienced this?
  2. Is there a way to delete duplicate workflows from the Creator Hub (via API or otherwise)?
  3. Is this a known bug on the Creator Hub side?

Thanks!

2

this sounds like a client-side cache mismatch — the workflow gets created server-side but the frontend doesnt refresh the list. have you tried clearing browser cache + logging back in to see if the workflows are actually there? the duplicates you created might already exist even if the UI error makes it look like they didnt.

3

Thanks for the suggestion, but I’ve already tried two different browsers that had never been used on the Creator Hub before — so there’s no cache involved.

The issue definitely seems server-side: the workflow is created in the backend but the API returns a 400 to the frontend anyway, leaving the UI stuck on the error page. This caused me to submit multiple times thinking it had failed, resulting in several duplicate workflows I can’t delete.

The most blocking issue right now is that the delete button is accessible on the Creator Hub, but when I try to delete the duplicates I get this error:

“The workflow ‘Create HubSpot support tickets from Tally form submissions’ could not be deleted!”

So I’m completely stuck — I can’t submit new templates cleanly and I can’t remove the broken duplicates either.

4

This is almost certainly Cloudflare’s WAF blocking your JSON, n8n has a help article on it: Issue: FetchError When Uploading Workflow to the n8n Templates Portal | n8n Help Center — for the duplicates email creators.io since theres no way to self-delete those.

5

yeah the WAF angle makes more sense — the 400 coming back even though the workflow lands server-side is exactly what you’d see when Cloudflare intercepts the payload. the link @achamm shared should cover the exact fix. and for the duplicates, email is the only route unfortunately, theres no self-delete option in the creator hub

6

Thank you guys I’ll look into it !