My wordpress is fully up to date and all plugins are up to date When click the submit button of Contact Form 7 I get the following errors. The form is sent and submitted but get no success notification and the spinner is spinning indefinitely. console: [Error] {code: "invalid_json", message: "The response is not a valid JSON response."} error and if I look at xhr request I see in response for an empty form the following error but spinner is spinning and nothing displays 404: Not Found{"contact_form_id":82,"status":"validation_failed","message":"One or more fields have an error. Please check and try again.","invalid_fields":[{"field":"birth","message":"Please fill out this field.","idref":null,"error_id":"wpcf7-f82-p13-o1-ve-birth"},{"field":"fullname","message":"Please fill out this field.","idref":null,"error_id":"wpcf7-f82-p13-o1-ve-fullname"},{"field":"city","message":"Please fill out this field.","idref":null,"error_id":"wpcf7-f82-p13-o1-ve-city"},{"field":"height","message":"Please fill out this field.","idref":null,"error_id":"wpcf7-f82-p13-o1-ve-height"},{"field":"shoe","message":"Please fill out this field.","idref":null,"error_id":"wpcf7-f82-p13-o1-ve-shoe"},{"field":"email","message":"Please fill out this field.","idref":null,"error_id":"wpcf7-f82-p13-o1-ve-email"}],"posted_data_hash":"","into":"#wpcf7-f82-p13-o1"}