This add-on must be installed through the Atlassian Universal Plugin Manager (UPM):

  1. Choose the workspace that you would like to install the app for

  2. Once in the chosen workspace, click on Settings

  3. Click on Marketplace under Apps and Features

  4. Click on All categories drop down and choose Code review

  5. Find Pull Request Checklist Buddy for Bitbucket in the list of apps proposed

  6. Click Add and grant access to the app

  7. The app should now be listed under Installed Apps

  8. You're done!