"No stash entries found" and " API request failed"

I get the below error in Travis at the step that is deploying to Heroku. My travis.yml is pasted below. I ran “travis setup heroku” and updated the API key but getting the same error. Any help would be appreciated
-Chirag

#console output

The command "make checkversions && COVERAGE=true make tests && make uploadcoverage" exited with 0.
cache.2
store build cache
0.00s
2.84snothing changed, not updating cache
2.08s$ rvm $(travis_internal_ruby) --fuzzy do ruby -S gem install dpl
Successfully installed dpl-1.10.0
1 gem installed
Installing deploy dependencies
Successfully installed multipart-post-2.0.0
Successfully installed faraday-0.15.2
Successfully installed rendezvous-0.1.2
Successfully installed netrc-0.11.0
Successfully installed dpl-heroku-1.10.0
5 gems installed
Preparing deploy
No stash entries found.
API request failed.
Message: Invalid credentials provided.
Reference:
failed to deploy

#travis.yml

language: node_js
node_js:
- '5.11'
script:
- make checkversions && COVERAGE=true make tests && make uploadcoverage
notifications:
  slack: apploiteam:LRNFFf6IymDfDFYZaYc4woPx
addons:
  code_climate:
    repo_token: 8376d545c9c6e90cc6393be6d4c080618e85fa28a1304c35005dbfc2546d3215
cache:
  directories:
  - node_modules
deploy:
  provider: heroku
  api_key:
    secure: <removed when pasting>
  app: find_a_job
  on:
    repo: apploitech/find_a_job
after_deploy:
- make endtoendtests || travis_terminate 1
env:
  global:
    secure: <removed when pasting>

Hey there,

For support from our team, we recommend reaching out to our support team at support@travis-ci.com, along with a link to your build log and repository so we can investigate more.

Thanks and all the best,

Kris

It would be nice to have had a follow up here, given that this error is happening to me now with an NPM provider deployment. My repo is a public repo on the .org domain name.

I see no deploy: skip_cleanup: true so I suspect the artifacts to upload are deleted.

Need to see the build to say for sure.