Olá. Comecei a fazer a parte de socket.io, mas travei novamente, agora aparece a seguinte mensagem:
SyntaxError: Unexpected token catch in C:\Users\Gisele\Documents\Alura\Node\casadocodigo\app\views\promocoes\form.ejs while compiling ejs
   at new Function (<anonymous>)
   at Template.compile (C:\Users\Gisele\Documents\Alura\Node\casadocodigo\node_modules\ejs\lib\ejs.js:491:12)
   at Object.compile (C:\Users\Gisele\Documents\Alura\Node\casadocodigo\node_modules\ejs\lib\ejs.js:306:16)
   at handleCache (C:\Users\Gisele\Documents\Alura\Node\casadocodigo\node_modules\ejs\lib\ejs.js:169:18)
   at View.exports.renderFile [as engine] (C:\Users\Gisele\Documents\Alura\Node\casadocodigo\node_modules\ejs\lib\ejs.js:374:14)
   at View.render (C:\Users\Gisele\Documents\Alura\Node\casadocodigo\node_modules\express\lib\view.js:126:8)
   at tryRender (C:\Users\Gisele\Documents\Alura\Node\casadocodigo\node_modules\express\lib\application.js:639:10)
   at Function.render (C:\Users\Gisele\Documents\Alura\Node\casadocodigo\node_modules\express\lib\application.js:591:3)
   at ServerResponse.render (C:\Users\Gisele\Documents\Alura\Node\casadocodigo\node_modules\express\lib\response.js:960:7)
   at Query._callback (C:\Users\Gisele\Documents\Alura\Node\casadocodigo\app\routes\promocoes.js:6:17)
   at Query.Sequence.end (C:\Users\Gisele\Documents\Alura\Node\casadocodigo\node_modules\mysql\lib\protocol\sequences\Sequence.js:86:24)
   at Query._handleFinalResultPacket (C:\Users\Gisele\Documents\Alura\Node\casadocodigo\node_modules\mysql\lib\protocol\sequences\Query.js:144:8)
   at Query.EofPacket (C:\Users\Gisele\Documents\Alura\Node\casadocodigo\node_modules\mysql\lib\protocol\sequences\Query.js:128:8)
   at Protocol._parsePacket (C:\Users\Gisele\Documents\Alura\Node\casadocodigo\node_modules\mysql\lib\protocol\Protocol.js:280:23)
   at Parser.write (C:\Users\Gisele\Documents\Alura\Node\casadocodigo\node_modules\mysql\lib\protocol\Parser.js:74:12)
   at Protocol.write (C:\Users\Gisele\Documents\Alura\Node\casadocodigo\node_modules\mysql\lib\protocol\Protocol.js:39:16)
form.ejs
<html>
    <body>
        <form action='/promocoes' method="post">
        <div>
            <input type="text" name="mensagem"/>
        </div>
        <div>
            <select name="livro[id]">
                <%for(var i=0;i<lista.length;i++){%>
                    <option value="<%=lista[i].id%>">lista[i].titulo%></option>
                </%}%>
            </select>
        </div>
        <input type="submit" value="Cadastrar promoção"/>
    </body>
</html>
Olha, eu vou tentar terminar o curso, mas tá dificil, eu não acho os erros, essas mensagens não ajudam, tem como capturar esses erros de uma forma mais legível?