CMS.js 404s and won't load the admin side

I tried clearing my cache and re-deploying with no luck. I’ve gone back months in deploys to see if a deploy preview of the admin side works, and none seem to. Is there an outage right now?

The client facing side works just fine, but the admin side won’t load at all.

Any help would be appreciated.

I believe we tracked this down in the helpdesk to having one of two causes:

  1. there was a service worker intercepting the requests for the JS files and failing, so we advised to remove it, and…
  2. there was a split test running, meaning all fixes around must be ported to all active branches (plus applied to any browsers that already had the badly configured service worker installed).

Hi Chris,

Sorry I’m just now getting back to you. I got derailed on some other tasks the last couple of days. I’ll be looking into the service worker tomorrow, and I’ll update if I can’t seem to get passed this issue.


Bobby Martin
UI Engineer | Mixmax
He/Him/His |

Just wanted to get back to this issue. I’ve stopped the split-tests and removed our SW and I’m still having this issue.

As discussed on github, this is caused by a missing trailing slash in the url ( instead of

The login issue is caused by the identity widget being loaded twice. gatsby-plugin-netlify-cms loads the script by default, it seems it’s loaded a second time by a script tag.

Hey Bobby. Long time, no see. :wave:

PERRY!! Hi! I hope you’ve been well!

Hey buddy! It’s been a nutty couple of years, but here we are! Great to see you around these parts! Seems like you are doing well for yourself, champ! :+1:

I heard about your accident, and I’m so glad you’re okay. Stoked I finally caught you on here! Things have definitely been great, trying to keep on the learning train. I and my team really love Netlify here at Mixmax.

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