Netlify CMS fails to load: “blocked due to MIME type (“text/html”) mismatch”

When I navigate to my site’s /admin path, I get a blank page, and the following errors in the browser console:

The resource from “https://amberley-farmers-market.netlify.app/netlify-identity.js” was blocked due to MIME type (“text/html”) mismatch (X-Content-Type-Options: nosniff).
admin
The resource from “https://amberley-farmers-market.netlify.app/react.production.min.js” was blocked due to MIME type (“text/html”) mismatch (X-Content-Type-Options: nosniff).
admin
The resource from “https://amberley-farmers-market.netlify.app/react-dom.production.min.js” was blocked due to MIME type (“text/html”) mismatch (X-Content-Type-Options: nosniff).
admin
The resource from “https://amberley-farmers-market.netlify.app/netlify-cms-app.js” was blocked due to MIME type (“text/html”) mismatch (X-Content-Type-Options: nosniff).
admin
The resource from “https://amberley-farmers-market.netlify.app/cms.js” was blocked due to MIME type (“text/html”) mismatch (X-Content-Type-Options: nosniff).

I can see from the network panel that all these requests got back a 404, so it seems to be a deployment issue. I’m at a loss as to how to troubleshoot this, as it was working with the starter I used, which is the Gatsby Netlify CMS starter. (Source code: https://gitlab.com/aidalgol/amberley-farmers-market)

Can anyone offer any advice on what might be going on?

Hey, seems like it’s working now. I just visited https://amberley-farmers-market.netlify.app/admin/ and it loads fine.

1 Like

So it is. I’m going to write this one off as an intermittent fault, then.