# Login not possible "Error ID XYZ" but login already worked

**URL:** https://community.zammad.org/t/login-not-possible-error-id-xyz-but-login-already-worked/4239
**Category:** Technical assistance
**Created:** [March 17, 2020, 10:25am UTC](https://community.zammad.org/t/login-not-possible-error-id-xyz-but-login-already-worked/4239 "2020-03-17T10:25:39Z")
**Posts on this page:** 1
**Showing post:** 6

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### Author: ![csaeum](https://community.zammad.org/letter_avatar_proxy/v4/letter/c/9fc29f/32.png) [@csaeum](https://community.zammad.org/u/csaeum)
#### Post date: [March 28, 2020, 7:12am UTC](https://community.zammad.org/t/login-not-possible-error-id-xyz-but-login-already-worked/4239/6 "2020-03-28T07:12:31Z")

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See here:

> [@Docker Treafik - csrf token validation failed](https://community.zammad.org/t/docker-treafik-csrf-token-validation-failed/4144):
>
> Hello I am running Zammad with Docker. In order to be able to use the domain and LetsEnCrypt I have this running with Traefik. Now I get everything displayed well and when I log in for the first time everything works. After an initial logout, I can no longer log in. He then always reports “csrf token validation failed”

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