# Error: Can't access property "registerAsyncHelper"

**URL:** https://meta.discourse.org/t/error-cant-access-property-registerasynchelper/221749
**Category:** Support
**Created:** [March 23, 2022, 7:55am UTC](https://meta.discourse.org/t/error-cant-access-property-registerasynchelper/221749 "2022-03-23T07:55:20Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![david](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/david/32/157490_2.png) [@david](https://meta.discourse.org/u/david)
#### Post date: [March 23, 2022, 10:49am UTC](https://meta.discourse.org/t/error-cant-access-property-registerasynchelper/221749/4 "2022-03-23T10:49:25Z")

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> [@Frontend on Prod Site Down -- Ember/Test error](https://meta.discourse.org/t/frontend-on-prod-site-down-ember-test-error/221704):
>
> My discourse instance front end is completely blank and wont load after the new upgrade. This is not a good thing, and I am a bit panicked as users are unhappy. Backend seems to be up. This happened after the newest upgrade today, on a digital ocean droplet running a container. I used launcher to rebuild the app. Any help is deeply appreciated Console error reads: app.js:31 Uncaught TypeError: Cannot read properties of undefined (reading 'registerAsyncHelper') at s.callback (vendor-suffi…

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