# Latest Version Upgrade Error due to yarnpkg not Found 404

**URL:** <https://forum.ghost.org/t/latest-version-upgrade-error-due-to-yarnpkg-not-found-404/16330>\
**Category:** Developer help\
**Created:** [August 6, 2020, 11:07am UTC](https://forum.ghost.org/t/latest-version-upgrade-error-due-to-yarnpkg-not-found-404/16330 "2020-08-06T11:07:24Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![mskian](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.ghost.org/mskian/32/4973_2.png) [@mskian](https://forum.ghost.org/u/mskian)\
**Post date:** [August 6, 2020, 11:07am UTC](https://forum.ghost.org/t/latest-version-upgrade-error-due-to-yarnpkg-not-found-404/16330/1 "2020-08-06T11:07:24Z")

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Command ` ghost update`

Output ⬇

```
+ sudo systemctl is-active ghost_groot-blog
✔ Checking system Node.js version
✔ Ensuring user is not logged in as ghost user
✔ Checking if logged in user is directory owner
✔ Checking current folder permissions
✔ Checking folder permissions
✔ Checking file permissions
✔ Checking content folder ownership
✔ Checking memory availability
✔ Checking for available migrations
✔ Checking for latest Ghost version
✖ Downloading and updating Ghost to v3.28.0
A ProcessError occurred.

Message: Command failed: yarn install --no-emoji --no-progress
warning ghost@3.28.0: The engine "cli" appears to be invalid.
warning Resolution field "moment@2.24.0" is incompatible with requested version "moment@2.25.1"
warning Resolution field "moment-timezone@0.5.23" is incompatible with requested version "moment-timezone@0.5.28"
warning Resolution field "moment@2.24.0" is incompatible with requested version "moment@2.27.0"
warning Resolution field "moment-timezone@0.5.23" is incompatible with requested version "moment-timezone@0.5.31"
error An unexpected error occurred: "https://registry.yarnpkg.com/@sentry/node/-/node-5.20.1.tgz: Request failed \"404 Not Found\"".

yarn install v1.22.4
[1/5] Validating package.json...
[2/5] Resolving packages...
[3/5] Fetching packages...
info If you think this is a bug, please open a bug report with the information provided in "/var/www/tmsblog/versions/3.28.0/yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

Exit code: 1

Debug Information:
    OS: Ubuntu, v16.04.6 LTS
    Node Version: v12.18.3
    Ghost Version: 3.26.1
    Ghost-CLI Version: 1.14.1
    Environment: production
    Command: 'ghost update'

Additional log info available in: /home/groot/.ghost/logs/ghost-cli-debug-2020-08-06T11_03_11_116Z.log

Try running ghost doctor to check your system for known issues.

You can always refer to https://ghost.org/docs/api/ghost-cli/ for troubleshooting.
```

---

<div class="post-metadata">

**Author:** ![daniellockyer](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.ghost.org/daniellockyer/32/11993_2.png) [@daniellockyer](https://forum.ghost.org/u/daniellockyer)\
**Post date:** [August 6, 2020, 11:13am UTC](https://forum.ghost.org/t/latest-version-upgrade-error-due-to-yarnpkg-not-found-404/16330/2 "2020-08-06T11:13:16Z")

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Hey @mskian! 👋

It looks like NPM are having some issues with accessing scoped packages from them. It’s being tracked in an incident report here: [npm Status - Issues accessing npmjs.com and installing scoped packages](https://status.npmjs.org/incidents/cksjqc1w11v5?u=yjqzk11ky282), but we hope for it to be resolved soon 🙂

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<div class="post-metadata">

**Author:** ![mskian](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.ghost.org/mskian/32/4973_2.png) [@mskian](https://forum.ghost.org/u/mskian)\
**Post date:** [August 6, 2020, 11:14am UTC](https://forum.ghost.org/t/latest-version-upgrade-error-due-to-yarnpkg-not-found-404/16330/3 "2020-08-06T11:14:28Z")

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Thanks for the Update