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error 404 Not Found: @ember-decorators/controller@^2.5.2

I know the package exists:

6652 verbose argv "/usr/bin/node" "/usr/bin/npm" "install"
6653 verbose node v8.12.0
6654 verbose npm  v6.4.1
6655 error code E404
6656 error 404 Not Found: @ember-decorators/controller@^2.5.2

I get the same error whether using npm or yarn

I fixed it:

I’m using a private artifactory registry for 1 of the npm modules in my package.json. I specify these options in my ~/.npmrc for this:

_auth = authtokenvaluehere
email =
always-auth = true

I also specify these values in the project local .npmrc:


It was something to do with this setup that was causing the not found error. After I removed these config values, ran yarn install then restored these values, then ran yarn install again it worked fine.