Firas
Hello and welcome to the forum 🙂
With "The Config is turned globaly off (set to 0)", do you mean the setting "Max. session time in hours" in the admin panel?
If yes, the issue makes sense; this setting controls how long session access tokens are valid for. If set to 0, access tokens are valid for 0 hours. There is no setting for "off" as sessions are by design temporary. If you want a very long timeout, you can set it to a high value like 87600 (ten years).