‘[email protected]’ is not in the npm registry

I have a CRA project that’s being deployed using Heroku. Deploying to production has never been an issue, but now when I try I get the following error:

-----> Installing dependencies
       Installing node modules
       npm ERR! code E404
       npm ERR! 404 Not Found - GET https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-8.0.1.tgz
       npm ERR! 404 
       npm ERR! 404  '[email protected]' is not in the npm registry.
       npm ERR! 404 You should bug the author to publish it (or use the name yourself!)
       npm ERR! 404 
       npm ERR! 404 Note that you can also install from a
       npm ERR! 404 tarball, folder, http url, or git url.
       
       npm ERR! A complete log of this run can be found in:
       npm ERR!     /tmp/npmcache.fuUsQ/_logs/2022-01-31T04_29_54_312Z-debug.log
-----> Build failed

All the versions of serialize-javascript that are installed:

% npm ls serialize-javascript   
[email protected] /Users/mpetersen/Documents/dev/on-borrowed-time
├─┬ [email protected]
│ └─┬ [email protected]
│   └─┬ [email protected]
│     └── [email protected]
└─┬ [email protected]
  ├─┬ [email protected]
  │ └── [email protected]
  └─┬ [email protected]
    └─┬ [email protected]
      └─┬ [email protected]
        └── [email protected]

Does anyone know why ‘[email protected]’ is not in the npm registry? I’ve tried updating react-scripts but it causes other dependency issues in my project.