# Get back to older version
**URL:** https://meta.discourse.org/t/get-back-to-older-version/44592
**Category:** Support
**Created:** [May 21, 2016, 9:11pm UTC](https://meta.discourse.org/t/get-back-to-older-version/44592 "2016-05-21T21:11:46Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Chopper](https://meta.discourse.org/u/Chopper)
#### Post date: [May 21, 2016, 9:11pm UTC](https://meta.discourse.org/t/get-back-to-older-version/44592/1 "2016-05-21T21:11:46Z")
I have the same problem than this post
> [@Uncaught ReferenceError - I18n is not defined (after upgrading 1.5 to 1.6)](https://meta.discourse.org/t/uncaught-referenceerror-i18n-is-not-defined-after-upgrading-1-5-to-1-6/42334):
>
> I run Discourse on my own AWS account and it runs on Ubuntu EC2, ElastiCache Redis, and RDS Postgress. It ran well when using discourse 1.5 and I upgraded to 1.6. Before: v1.5.0.beta13b +140 After: 1.6.0.beta1 After upgrading to 1.6 using # launcher rebuild app, the web browser cannot display ant pages. Here is the screenshot of Chrome Developer Tool:
The problem is no resolved at all, i guess it’s because i have some custom javascript. I can’t disabled it because i can’t access to the forum. With the previous verison it’s works fine.
How can i go back to beta5 ?
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### Author:  [@cpradio](https://meta.discourse.org/u/cpradio)
#### Post date: [May 21, 2016, 9:46pm UTC](https://meta.discourse.org/t/get-back-to-older-version/44592/2 "2016-05-21T21:46:00Z")
I think @techapj made mention of appending ?preview-style=none to the url to prevent the custom styles from rendering. Give that a try.
> [@Broke the login system](https://meta.discourse.org/t/broke-the-login-system/44475/3):
>
> Okay, I see that you included some incompatible JS files. Here’s how to access your instance again: [http://forum.example.com/?preview-style=none](http://forum.example.com/?preview-style=none) Notice ?preview-style=none at the end of URL, it will not include your customizations. So login using that URL and remove the JS libraries you included in CSS/HTML customization.
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### Author:  [@JammyDodger](https://meta.discourse.org/u/JammyDodger)
#### Post date: [June 8, 2024, 12:45pm UTC](https://meta.discourse.org/t/get-back-to-older-version/44592/8 "2024-06-08T12:45:42Z")
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