Controlled Admin Access Plugin – User registration problem

  • Dear Sir,

    The isntalled plug (Controlled Admin Access) is not able to send email to user with login detail.
    I needed to setup new admin user with restricted access. The password is generated but user email is not being sent out.
    When I try to login with the username / password on the admin panel it returns the following error message:

    Warning: call_user_func() expects parameter 1 to be a valid callback, no array or string given in …(directory / function.php on line that defines user function as follows:
    Line 2680 call_user_func( $function, $message, $title, $args );

    Could you please let me know how to resolve this?

    Many thanks.

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