Dont work for 1 course

Hello,   Can you help me pls??   Why its dont work? http://prntscr.com/lrng5o   i'm using this form code: [form to="" subject="" event=""] [form_element type="text" validate="required" options="" upload_options="null" placeholder="Nome"] [form_element type="text" validate="email" options="" upload_options="null" placeholder="E-mail"] [form_element type="text" validate="phone" options="" upload_options="null" placeholder="Telefone"] [form_element type="upload" validate="required" options="" upload_options="PDF,TEXT,DOC,DOCx,PPT,PPTX,ZIP,PNG,JPG,JPEG" placeholder="Documento"] [form_element type="captcha" validate="required" options="" upload_options="null" placeholder=""] [form_element type="submit" validate="" options="" upload_options="null" placeholder="Enviar"] [/form]   https://grupoeducativa.com.br/course/curso-de-capacitacao-avaliacao-psicologica-de-aptidoes-para-porte-de-arma-de-fogo-online/#   i'm using the same setting in other course and work fine. Just in this course dont work