I am using Solspace User for new member registration. I've installed the demo templates and attempting to register a new user. Submission of the registration form throws the following errors:
Message: Undefined property: stdClass::$csrf_hidden_name Filename: user/mod.user.php Line Number: 5955
This is followed by a series of "headers already sent" errors.
Oddly, the new user is successfully saved to the members table, and can subsequently login successfully.
Using EE 2.7.3 and Solspace User 3.4.6
Update: I then regressed back to User 3.4.5, and it works successfully w/ EE 2.7.3