NPM deploy fails always on travis-ci.com

Deploying a package automatically from a job on travis-ci.com always fails for me while the exact same config works fine on travis-ci.org.

The error:

NPM API key format changed recently. If your deployment fails, check your API key in ~/.npmrc.
http://docs.travis-ci.com/user/deployment/npm/
~/.npmrc size: 48
env: ‘to’: No such file or directory

I created the API key like this:

travis login --pro
travis encrypt ...

My config:

language: node_js
node_js:
    - '12'

jobs:
    include:
        - stage: deploy
          node_js: "lts/*"
          script: skip
          deploy:
              - provider: npm
                email: info@saturnserver.org
                api_key:
                    secure: 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
                skip_cleanup: true
                on:
                    branch: master
                    repo: Ionaru/eslint-config
                    tags: true

What do I need to change for this to work? I like having all my projects in one place and I don’t mind migrating everything to travis-ci.com, but it needs to work.

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