A PHP Error was encountered

Severity: Notice

Message: Undefined variable: user

Filename: controllers/Membership.php

Line Number: 722

Backtrace:

File: /home/proper1q/public_html/application/controllers/Membership.php
Line: 722
Function: _error_handler

File: /home/proper1q/public_html/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Notice

Message: Undefined variable: user

Filename: controllers/Membership.php

Line Number: 723

Backtrace:

File: /home/proper1q/public_html/application/controllers/Membership.php
Line: 723
Function: _error_handler

File: /home/proper1q/public_html/index.php
Line: 315
Function: require_once

400

Array
(
    [name] => INVALID_REQUEST
    [message] => Request is not well-formed, syntactically incorrect, or violates schema.
    [debug_id] => ab8e0bc0e8ec4
    [details] => Array
        (
            [0] => Array
                (
                    [field] => /subscriber/email_address
                    [value] => 
                    [location] => body
                    [issue] => INVALID_PARAMETER_SYNTAX
                    [description] => The value of a field does not conform to the expected format.
                )

        )

    [links] => Array
        (
            [0] => Array
                (
                    [href] => https://developer.paypal.com/docs/api/v1/billing/subscriptions#INVALID_REQUEST
                    [rel] => information_link
                    [method] => GET
                )

        )

)
0: