unable to change language

[Kam125]

Description

Greetings everyone.

I'm using next-intl for translation and as per examples it works perfectly fine. But as soon I deploy it on vercel my website return 500 | Internal server error and nothing shows up. After debugging I found out if I use cookies from next/headers that's what causing the issue. As soon I use js-cookie or use localstorage to store selected language language doesn't change as it returns always the old value or default value which is en. It doesn't work on both enviroments.

I'm debugging this issue from past 4 days. Any help will be much appreciated. I'm using next-intl without I18n routing.

Verifications

• I've verified that the problem I'm experiencing isn't covered in the docs.
• I've searched for similar, existing issues on GitHub and Stack Overflow.
• I've compared my app to a working example to look for differences.

Mandatory reproduction URL

https://abc-landing-page.vercel.app/

Reproduction description

it's strange as it's working on development but giving 500 | internal server error

Expected behaviour

Should work on deployment url as well.

[pieterjanscheir]

The reproduction url does not work. There is no deployment linked to it.