register form BUG please help at earliest

hello sir,
here is the link to page
is the link to the registration form which has been giving a BIG BUG lately…please help
PROBLEM : on submitting the form after filling, it returns an OBJECT with all values in it, please try yourself and will come to know.
we also tried creating new form, now what should i do, i have some coding skill so u can guide me and i can perform some changes in wp-plugin code if u want, please help

its something like this :
@ultimatemembersupport please please reply fast

array (
‘message’ => ‘Invalid user ID.’,
‘dump’ =>
array (
‘ID’ => 0,
‘display_name’ => ‘ ‘,
),
‘changes’ =>
array (
‘form_id’ => ‘62160’,
‘custom_fields’ => ‘a:14:{s:10:”user_login”;a:16:{s:6:”in_row”;s:9:”_um_row_1″;s:10:”in_sub_row”;s:1:”0″;s:9:”in_column”;s:1:”1″;s:4:”type”;s:4:”text”;s:7:”metakey”;s:10:”user_login”;s:8:”position”;s:1:”1″;s:5:”title”;s:8:”Username”;s:9:”min_chars”;s:1:”3″;s:10:”visibility”;s:3:”all”;s:11:”placeholder”;s:8:”Username”;s:6:”public”;s:1:”1″;s:8:”validate”;s:15:”unique_username”;s:9:”max_chars”;s:2:”24″;s:8:”required”;s:1:”1″;s:8:”editable”;s:1:”0″;s:8:”in_group”;s:0:””;}s:10:”user_email”;a:15:

and lot many lines more…….

The page I need help with: [log in to see the link]