XF 2.1 Please enter a value for the required field 'secret_key'.


Well-known member
When a guest is trying to register, he got after submit the for the following error: "Please enter a value for the required field 'secret_key'."
I couldn't find any error logs in acp, console or on the server. I doesn't work on any style, also default.

When i disable ALL addons in config.php the registration is okay. Did anyone has something else? The last change in the last few days is the upgrade of XF2.1.7


XenForo moderator
Staff member
If it works with add-ons disabled then you will need to identify which one is causing it.

It's possible it will need to be updated to be compatible with 2.1.7.