# Upgrading from keycloak 12 to 18

**URL:** <https://forum.keycloak.org/t/upgrading-from-keycloak-12-to-18/16170>\
**Category:** Configuring the server\
**Tags:** authentication\
**Created:** [June 27, 2022, 1:35pm UTC](https://forum.keycloak.org/t/upgrading-from-keycloak-12-to-18/16170 "2022-06-27T13:35:43Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![c.neocleous](https://avatars.discourse-cdn.com/v4/letter/c/46a35a/32.png) [@c.neocleous](https://forum.keycloak.org/u/c.neocleous)\
**Post date:** [June 27, 2022, 1:35pm UTC](https://forum.keycloak.org/t/upgrading-from-keycloak-12-to-18/16170/1 "2022-06-27T13:35:43Z")

</div>

Hello,

I am trying to upgrade from version 12.0.4 to 18.0.1.  
I was able to migrate my data and start the server on development mode but when trying to login I am getting an error for cookie not found.

![cookie_not_found](https://global.discourse-cdn.com/free1/uploads/keycloak/original/2X/2/2a194f5f32272ca7b290f0d6044be7bcd1793d0b.png)

Any idea what may causing this issue?

Thanks,  
Charalambos