Error code: invalidconfirmdata

Create New User:

Either, when responding immediately, click on email link or copy/paste to browser: 

http://...login/confirm.php?data=3D79I4hlz7Dl79lG9/ng

and receive error code:invalidconfirmdata.

Stack trace:

• line 497 of /lib/setuplib.php: moodle_exception thrown
• line 104 of /login/confirm.php: call to print_error()