Upgrading backstage app to release-2021-06-28 or latest causing 'Settings' label is missing

Expected Behavior

Upgrading from the previous version of the backstage app to release-2021-06-28 should be working normally. I have a backstage app that bootstrapped before release-2021-06-28 and upgrades it using this command: yarn backstage-cli versions:bump

Current Behavior

The ‘Settings’ label on the sidebar is missing, and I can’t click the toggle sidebar switch on the settings page.

Possible Solution

After I migrate the backstage app dependencies package @backstage/core to @backstage/core-* fixes the problem. The ‘Settings’ label and sidebar toggle can be clicked again.

Steps to Reproduce

1. Scaffold new backstage app before release-2021-06-24
2. Upgrade backstage to the latest by running: yarn backstage-cli versions:bump

Context

If migrating to separate @backstage/core-* is required then it should be stated in the changelog. Not sure if this is a bug that worth to take a look, or we can just stated in the changelog a guide for the migration.

Your Environment

• NodeJS Version: v12.22.1
• Operating System and Version: MacOS Catalina 10.15.7
• Browser Information: Chrome Version 91.0.4472.106 (Official Build) (x86_64)

[timbonicus]

@dehamzah The arguments after core-imports are folders to process. So to run it in a standalone plugin repo, you’d want to change these to the folder(s) that are present. So instead of:

npx @backstage/codemods apply core-imports packages plugins

You can run this (for example, if there’s just a src directory):

npx @backstage/codemods apply core-imports src

[benjdlambert]

@dehamzah what’s your working directory when running this codemod? It should be in the root of your Backstage repo what create-app made for you. Looks like it can’t find packages or plugins which is a little concerning as one of those should exist at least. 😅