[SOLVED] Login works just once (need to clean the cache to login again...)

Hello,
I have a super weird behavior with my site. I can login once if cache has been purged.
Then if I want to login again I got:

danger
La session a expiré ou les cookies ne sont pas activés par votre navigateur. Veuillez cliquer sur "Actualiser" et vous assurer d'avoir bien activé les cookies dans votre navigateur.

I have deactivated the spoof checking in integrations, but still having this issue.
Cache is also deactivated in Joomla, Gzip off/on, shared session off/on has no effect.
I really don't get it.
Is there something I may check ?
Thanks

I have a super weird behavior with my site. I can login once if cache has been purged.

Clear what cache? You mentioned caching was already turned off.

danger
La session a expiré ou les cookies ne sont pas activés par votre navigateur. Veuillez cliquer sur "Actualiser" et vous assurer d'avoir bien activé les cookies dans votre navigateur.

The CSRF token is being rejected then. This is generated and validated by Joomla. Are you having this issue with any other forms? Be sure your CB Login Module does not have caching enabled as you cannot cache forms due to their CSRF tokens.

Thanks, after double checking I saw that the cache plugin was activated. I've excluded all CB related pages, works perfectly.
Thanks !