error

Cannot read property 'fields' of undefined

TypeError: Cannot read property 'fields' of undefined
    at router.get (/home/ec2-user/heavypenguin/server/routes/index.js:202:21)
    at Layer.handle [as handle_request] (/home/ec2-user/heavypenguin/node_modules/express/lib/router/layer.js:95:5)
    at next (/home/ec2-user/heavypenguin/node_modules/express/lib/router/route.js:137:13)
    at Route.dispatch (/home/ec2-user/heavypenguin/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/home/ec2-user/heavypenguin/node_modules/express/lib/router/layer.js:95:5)
    at /home/ec2-user/heavypenguin/node_modules/express/lib/router/index.js:281:22
    at param (/home/ec2-user/heavypenguin/node_modules/express/lib/router/index.js:354:14)
    at param (/home/ec2-user/heavypenguin/node_modules/express/lib/router/index.js:365:14)
    at Function.process_params (/home/ec2-user/heavypenguin/node_modules/express/lib/router/index.js:410:3)
    at next (/home/ec2-user/heavypenguin/node_modules/express/lib/router/index.js:275:10)