About nodejs Debugging?

  node.js, question

How to debug the following problems? What skills do you have in debugging? (I looked at my index.ejs and found nothing wrong)

Error
 Looks like something broke!
 
 Message:
 Unexpected identifier in "index.ejs"
 
 Stack:
 SyntaxError: Unexpected identifier in "index.ejs"
 at Function (native)
 at exports.compile (/home/quoniam/projects/V-club/node_modules/co-ejs/lib/ejs.js:339:15)
 at exports.render (/home/quoniam/projects/V-club/node_modules/co-ejs/lib/ejs.js:381:66)
 at next (native)
 at exports.renderFile (/home/quoniam/projects/V-club/node_modules/co-ejs/lib/ejs.js:412:17)
 at next (native)
 at Object.app.context.render (/home/quoniam/projects/V-club/node_modules/co-ejs/lib/ejs.js:167:23)
 at next (native)
 at onFulfilled (/home/quoniam/projects/V-club/node_modules/koa/node_modules/co/index.js:65:19)
 at process._tickCallback (node.js:356:9)

Delete the possible problems and slowly investigate them. I found the mistakes in this way.