Hi all, let me show you what you can do in case you get this kind of error while you tried to use Netlify CMS

I got this error while using Eleventy, and i got a help from one of the best front end developer Mutsinzi Eric one of his work check here. I think this solution can helps you also if you are using Hugo, Gatsby, Nuxt, Gridsome, Zola, Sapper, etc.

1. check wether you can be able to download config.yml
2. check if the link for config.yml file is correct

3. check wether you can be able to download config.yml

do this copy the link in your browser example: https://yourwebsite/admin/config.yml ,if config.yml doesn't downloaded automatically it means that config.yml file does not copied into the published folder for instance published folder in eleventy is _site the screenshoot shows folder structure

when eleventy --serve command executed the updated content got generated automatically in _site folder if you expand _site and check the admin folder you are supposed to see two files 1.index.html this file has scripts to load netlify cms. 2. config.yml

If config.yml was not generated do this create a file called .eleventy.js and add this code

module.exports = (eleventyConfig)=>{

eleventyConfig.addPasstroughCopy("admin");

}

This means eleventy framework will copy all the contents of admin folder in _site.

2. check if the link for config.yml file is correct

secondly if option 1 doesn't work check the link if is correct on index.html file located in admin folder,check this screenshoot

3. inspect your browser page it might be an error like this

In this case you will need to create a file called .netlify.tomlat the root of your project and add these lines

commit your changes and publish your repo and also try to clean the cache of your browser and see

4.If the issue persist you will need to use netlify website-name instead of your external domain (step 2 title) something looks like this https://yoursite.netlify.app