Error: Data structure returned is not convertible in the requested format. Try to call this method with the parameters '&format=original&serialize=1'; you will get the original php data structure serialized. The data structure looks like this: $data = array ( 0 => array ( 'idsiteform' => 2, 'idsite' => '62', 'name' => 'Comment Form', 'description' => 'Standard WordPress comment form on posts', 'status' => 'running', 'in_overview' => 0, 'match_form_rules' => array ( 0 => array ( 'attribute' => 'form_id', 'pattern' => 'equals_exactly', 'value' => 'commentform', ), ), 'match_page_rules' => array ( ), 'conversion_rules' => array ( ), 'fields' => array ( 0 => array ( 'name' => 'comment', 'type' => 'textarea', 'displayName' => 'Comment', ), 1 => array ( 'name' => 'author', 'type' => 'text', 'displayName' => 'Name', ), 2 => array ( 'name' => 'email', 'type' => 'text', 'displayName' => 'Email', ), 3 => array ( 'name' => 'subscribe-reloaded', 'type' => 'select', 'displayName' => '', ), 4 => array ( 'name' => 'g-recaptcha-response', 'type' => 'textarea', 'displayName' => 'Captcha', ), 5 => array ( 'name' => 'wprs_headline', 'type' => 'text', 'displayName' => '', ), 6 => array ( 'name' => 'url', 'type' => 'text', 'displayName' => '', ), 7 => array ( 'name' => 'wp-comment-cookies-consent', 'type' => 'checkbox', 'displayName' => '', ), ), 'auto_created' => true, 'created_date' => '2017-03-25 08:15:00', 'updated_date' => '2019-08-04 04:35:51', ), 1 => array ( 'idsiteform' => 7, 'idsite' => '62', 'name' => 'Apply to Job Form', 'description' => '', 'status' => 'running', 'in_overview' => 0, 'match_form_rules' => array ( 0 => array ( 'attribute' => 'form_id', 'pattern' => 'equals', 'value' => 'wpjb-apply-form', ), ), 'match_page_rules' => array ( ), 'conversion_rules' => array ( ), 'fields' => array ( 0 => array ( 'name' => 'applicant_name', 'type' => 'text', 'displayName' => 'Applicant name', ), 1 => array ( 'name' => 'email', 'type' => 'text', 'displayName' => 'Email', ), 2 => array ( 'name' => 'cv_file', 'type' => 'file', 'displayName' => 'CV file', ), 3 => array ( 'name' => 'resume', 'type' => 'textarea', 'displayName' => 'Resume textarea', ), 4 => array ( 'name' => 'resume_id', 'type' => 'checkbox', 'displayName' => 'resume id', ), ), 'auto_created' => true, 'created_date' => '2017-03-25 11:53:57', 'updated_date' => '2018-04-24 09:28:46', ), 2 => array ( 'idsiteform' => 29, 'idsite' => '62', 'name' => 'Add Job Form', 'description' => '', 'status' => 'running', 'in_overview' => 0, 'match_form_rules' => array ( 0 => array ( 'attribute' => 'form_name', 'pattern' => 'equals', 'value' => 'wpjb-form-job-add', ), ), 'match_page_rules' => array ( ), 'conversion_rules' => array ( ), 'fields' => array ( 0 => array ( 'name' => 'company_name', 'type' => 'text', 'displayName' => '', ), 1 => array ( 'name' => 'company_email', 'type' => 'text', 'displayName' => '', ), 2 => array ( 'name' => 'job_type', 'type' => 'select', 'displayName' => '', ), 3 => array ( 'name' => 'job_category', 'type' => 'select', 'displayName' => '', ), 4 => array ( 'name' => 'job_title', 'type' => 'text', 'displayName' => '', ), 5 => array ( 'name' => 'job_description', 'type' => 'textarea', 'displayName' => '', ), 6 => array ( 'name' => 'job_country', 'type' => 'select', 'displayName' => '', ), 7 => array ( 'name' => 'job_location', 'type' => 'text', 'displayName' => '', ), 8 => array ( 'name' => 'company_website', 'type' => 'text', 'displayName' => '', ), 9 => array ( 'name' => 'company_logo', 'type' => 'file', 'displayName' => '', ), ), 'auto_created' => false, 'created_date' => '2018-03-28 20:49:04', 'updated_date' => '2018-03-30 15:34:49', ), 3 => array ( 'idsiteform' => 30, 'idsite' => '62', 'name' => 'Candidate Registration Form', 'description' => '', 'status' => 'running', 'in_overview' => 0, 'match_form_rules' => array ( 0 => array ( 'attribute' => 'form_name', 'pattern' => 'equals', 'value' => 'wpjb-form-register', ), ), 'match_page_rules' => array ( ), 'conversion_rules' => array ( ), 'fields' => array ( 0 => array ( 'name' => 'user_login', 'type' => 'text', 'displayName' => '', ), 1 => array ( 'name' => 'user_password', 'type' => 'password', 'displayName' => '', ), 2 => array ( 'name' => 'user_password2', 'type' => 'password', 'displayName' => '', ), 3 => array ( 'name' => 'user_email', 'type' => 'text', 'displayName' => '', ), ), 'auto_created' => false, 'created_date' => '2018-03-28 20:51:50', 'updated_date' => '2018-03-30 16:24:09', ), 4 => array ( 'idsiteform' => 31, 'idsite' => '62', 'name' => 'Resume Search', 'description' => '', 'status' => 'running', 'in_overview' => 0, 'match_form_rules' => array ( 0 => array ( 'attribute' => 'form_name', 'pattern' => 'equals', 'value' => 'wpjb-form-resumes-search', ), ), 'match_page_rules' => array ( ), 'conversion_rules' => array ( 0 => array ( 'attribute' => 'page_url', 'pattern' => 'starts_with', 'value' => 'https://divezone.net/resumes/find', ), ), 'fields' => array ( 0 => array ( 'name' => 'query', 'type' => 'text', 'displayName' => '', ), 1 => array ( 'name' => 'degree', 'type' => 'select', 'displayName' => '', ), 2 => array ( 'name' => 'experience', 'type' => 'select', 'displayName' => '', ), 3 => array ( 'name' => 'category', 'type' => 'select', 'displayName' => '', ), 4 => array ( 'name' => 'posted', 'type' => 'select', 'displayName' => '', ), ), 'auto_created' => false, 'created_date' => '2018-03-28 20:54:35', 'updated_date' => '2018-03-29 03:04:59', ), 5 => array ( 'idsiteform' => 32, 'idsite' => '62', 'name' => 'Build Resume Form', 'description' => '', 'status' => 'running', 'in_overview' => 0, 'match_form_rules' => array ( 0 => array ( 'attribute' => 'form_id', 'pattern' => 'equals', 'value' => 'wpjb-resume', ), ), 'match_page_rules' => array ( ), 'conversion_rules' => array ( ), 'fields' => array ( 0 => array ( 'name' => 'firstname', 'type' => 'text', 'displayName' => '', ), 1 => array ( 'name' => 'lastname', 'type' => 'text', 'displayName' => '', ), 2 => array ( 'name' => 'country', 'type' => 'select', 'displayName' => '', ), 3 => array ( 'name' => 'address', 'type' => 'text', 'displayName' => '', ), 4 => array ( 'name' => 'email', 'type' => 'text', 'displayName' => '', ), 5 => array ( 'name' => 'phone', 'type' => 'text', 'displayName' => '', ), 6 => array ( 'name' => 'headline', 'type' => 'textarea', 'displayName' => '', ), 7 => array ( 'name' => 'is_active', 'type' => 'checkbox', 'displayName' => '', ), 8 => array ( 'name' => 'image', 'type' => 'file', 'displayName' => '', ), 9 => array ( 'name' => 'file', 'type' => 'file', 'displayName' => '', ), 10 => array ( 'name' => 'title', 'type' => 'text', 'displayName' => '', ), 11 => array ( 'name' => 'years_experience', 'type' => 'select', 'displayName' => '', ), 12 => array ( 'name' => 'experience', 'type' => 'textarea', 'displayName' => '', ), 13 => array ( 'name' => 'degree', 'type' => 'select', 'displayName' => '', ), ), 'auto_created' => false, 'created_date' => '2018-03-28 20:59:24', 'updated_date' => '2018-03-29 03:09:32', ), 6 => array ( 'idsiteform' => 40, 'idsite' => '62', 'name' => 'Contact Us Form', 'description' => '', 'status' => 'running', 'in_overview' => 1, 'match_form_rules' => array ( 0 => array ( 'attribute' => 'form_id', 'pattern' => 'equals_exactly', 'value' => 'gform_11', ), ), 'match_page_rules' => array ( ), 'conversion_rules' => array ( ), 'fields' => array ( 0 => array ( 'name' => 'input_3', 'type' => 'textarea', 'displayName' => 'Overview of your needs', ), 1 => array ( 'name' => 'input_5', 'type' => 'text', 'displayName' => 'Company', ), 2 => array ( 'name' => 'input_4', 'type' => 'text', 'displayName' => 'Name', ), 3 => array ( 'name' => 'input_1', 'type' => 'text', 'displayName' => 'Email', ), 4 => array ( 'name' => 'g-recaptcha-response', 'type' => 'textarea', 'displayName' => 'reCAPTCHA', ), ), 'auto_created' => false, 'created_date' => '2017-03-28 20:51:50', 'updated_date' => '2017-03-30 16:24:09', ), 7 => array ( 'idsiteform' => 41, 'idsite' => '62', 'name' => 'Newsletter Signup Form', 'description' => '', 'status' => 'running', 'in_overview' => 1, 'match_form_rules' => array ( 0 => array ( 'attribute' => 'form_id', 'pattern' => 'equals_exactly', 'value' => 'ema_signup_form', ), ), 'match_page_rules' => array ( ), 'conversion_rules' => array ( 0 => array ( 'attribute' => 'page_path', 'pattern' => 'contains', 'value' => '/newsletter/thank-you', ), ), 'fields' => array ( 0 => array ( 'name' => 'signup[email]', 'type' => 'text', 'displayName' => 'Email', ), 1 => array ( 'name' => '5dc4f13be90447e325450ff6c4e02f42', 'type' => 'text', 'displayName' => 'beacon2', ), 2 => array ( 'name' => 'beacon', 'type' => 'checkbox', 'displayName' => 'beacon', ), ), 'auto_created' => false, 'created_date' => '2017-03-28 20:51:50', 'updated_date' => '2017-03-30 16:24:09', ), 8 => array ( 'idsiteform' => 42, 'idsite' => '62', 'name' => 'Checkout Form', 'description' => '', 'status' => 'running', 'in_overview' => 1, 'match_form_rules' => array ( 0 => array ( 'attribute' => 'form_name', 'pattern' => 'equals_exactly', 'value' => 'checkout', ), ), 'match_page_rules' => array ( ), 'conversion_rules' => array ( 0 => array ( 'attribute' => 'page_path', 'pattern' => 'contains', 'value' => '/order-received', ), ), 'fields' => array ( 0 => array ( 'name' => 'billing_first_name', 'type' => 'text', 'displayName' => 'Billing First Name', ), 1 => array ( 'name' => 'billing_last_name', 'type' => 'text', 'displayName' => 'Billing Last Name', ), 2 => array ( 'name' => 'billing_company', 'type' => 'text', 'displayName' => 'Billing Company', ), 3 => array ( 'name' => 'billing_country', 'type' => 'select', 'displayName' => 'Billing Country', ), 4 => array ( 'name' => 'billing_address_1', 'type' => 'text', 'displayName' => 'Billing Address Line 1', ), 5 => array ( 'name' => 'billing_address_2', 'type' => 'text', 'displayName' => 'Billing Address Line 2', ), 6 => array ( 'name' => 'billing_city', 'type' => 'text', 'displayName' => 'Billing City', ), 7 => array ( 'name' => 'billing_postcode', 'type' => 'text', 'displayName' => 'Billing Postcode', ), 8 => array ( 'name' => 'billing_phone', 'type' => 'tel', 'displayName' => 'Billing Phone', ), 9 => array ( 'name' => 'billing_email', 'type' => 'email', 'displayName' => 'Billing Email', ), 10 => array ( 'name' => 'account_password', 'type' => 'password', 'displayName' => 'Account Password', ), 11 => array ( 'name' => 'customer_location_self_certified', 'type' => 'checkbox', 'displayName' => 'Location Confirmation', ), 12 => array ( 'name' => 'payment_method', 'type' => 'radio', 'displayName' => 'Payment Method', ), 13 => array ( 'name' => 'terms', 'type' => 'checkbox', 'displayName' => 'Terms & Conditions', ), 14 => array ( 'name' => 'vat_number', 'type' => 'text', 'displayName' => 'EU VAT Number', ), 15 => array ( 'name' => 'braintree_paypal_button', 'type' => 'image', 'displayName' => 'PayPal Button', ), 16 => array ( 'name' => 'billing_state', 'type' => 'select', 'displayName' => 'Billing State', ), ), 'auto_created' => false, 'created_date' => '2017-03-28 20:51:50', 'updated_date' => '2019-10-14 02:17:48', ), );