Error NewTicket.E3 (JSON shape unexpected)

Here is the JSON we deserved, but not what we needed:

{ "site_name": "English Wikivoyage", "site_locale": "en", "site_eua_page": "enwv/eua", "site_privacy_page": "enwv/privacy", "target_namespace": "enwv", "admin_list_page": "enwv/admin-list", "main_title": "Choose the problems you encountered", "selectables": [ {"id": "help_with_registration", "button_text": "I want to register an account", "selected": false, "prompt_text_field": ["email", "new_user_name", "other_blocked_info"]}, {"id": "cannot_edit", "button_text": "I have an account but can't edit", "selected": false, "prompt_text_field": ["email", "user_name", "other_blocked_info"]}, {"id": "blocked_user", "button_text": "My account is blocked", "selected": false, "prompt_text_field": ["email", "user_name", "blocked_reason", "other_blocked_info"]}, {"id": "other_problems", "button_text": "I have other questions", "selected": false, "prompt_text_field": ["email", "more_questions"]} ], "text_fields": [ {"id": "email", "title": "Your email address", "text_value": "", "display": "prompt", "type": "line", "tip_segments":[]}, {"id": "new_user_name", "title": "The username you want to register", "text_value": "", "display": "prompt", "type": "line", "tip_segments":[]}, {"id": "user_name", "title": "Your current username", "text_value": "", "display": "prompt", "type": "line", "tip_segments": [{"text": "This username is your Wikivoyage username. "}, {"text": "Help me find it", "href": "/enwv/find-username"}]}, {"id": "blocked_reason", "title": "Please paste any texts you were shown when you were blocked", "text_value": "", "display": "prompt", "type": "line", "tip_segments": [{"text": "If you are affected by an IP block "}, {"text": "then you're pretty much on your own", "href": "/enwv/find-username"}]}, {"id": "other_blocked_info", "title": "Anthing else we should know?", "text_value": "", "display": "prompt", "type": "multiline", "tip_segments": []}, {"id": "more_questions", "title": "Put your questions here", "text_value": "", "display": "prompt", "type": "multiline", "tip_segments": []} ], "supp_info": [ [{"text": "You can also send a mail "}, {"text": "here", "href": "/enwv/mailing-list"}, {"text": "."}] ], "lang_notices": [ ["en", "Notice to English users"], ["ja", "日本語利用者へのお知らせ"] ], "footer_notices": [ "English wikivoyage: https://en.wikivoyage.org/" ] }

To fix this error

Fix this JSON here: /enwv/new-ticket-form.json

Error trace:

{"key":"validation","parent":{"key":2,"parent":{"key":"text_fields","parent":{"key":null,"parent":null}}}}

The example to measure against:

{ "site_name": "Site name", "site_locale": "en", "site_eua_page": "wxyz/eua", "site_privacy_page": "wxyz/privacy", "target_namespace": "wxyz", "admin_list_page": "wxyz/admin-list", "main_title": "Select all that apply", "selectables": [ { "id": "1", "button_text": "Selection 1", "selected": false, "prompt_text_field": [ "1", "2", "3" ] } ], "text_fields": [ { "id": "1", "title": "Input 1", "text_value": "", "display": "prompt", "validation": "email", "type": "line", "tip_segments": [] }, { "id": "2", "title": "Input 2", "text_value": "", "display": "prompt", "validation": "nonempty", "type": "multiline", "tip_segments": [] }, { "id": "3", "title": "Input 3", "text_value": "", "display": "prompt", "validation": "none", "type": "line", "tip_segments": [ { "text": "Text " }, { "text": "link", "href": "/" } ] } ], "supp_info": [ [ { "text": "Text " }, { "text": "link", "href": "/" }, { "text": "." } ] ], "lang_notices": [ [ "en", "Notice to English users" ], [ "ja", "日本語利用者へのお知らせ" ] ], "footer_notices": [ "Footer notice 1", "Footer notice 2" ] }