Cannot read property '0' of undefined

TypeError: Cannot read property '0' of undefined
    at /home/ec2-user/klambert/app/controllers/home.js:80:35
    at Layer.handle [as handle_request] (/home/ec2-user/klambert/node_modules/express/lib/router/layer.js:95:5)
    at next (/home/ec2-user/klambert/node_modules/express/lib/router/route.js:131:13)
    at Route.dispatch (/home/ec2-user/klambert/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/home/ec2-user/klambert/node_modules/express/lib/router/layer.js:95:5)
    at /home/ec2-user/klambert/node_modules/express/lib/router/index.js:277:22
    at param (/home/ec2-user/klambert/node_modules/express/lib/router/index.js:349:14)
    at param (/home/ec2-user/klambert/node_modules/express/lib/router/index.js:365:14)
    at param (/home/ec2-user/klambert/node_modules/express/lib/router/index.js:365:14)
    at Function.process_params (/home/ec2-user/klambert/node_modules/express/lib/router/index.js:410:3)
    at next (/home/ec2-user/klambert/node_modules/express/lib/router/index.js:271:10)
    at Function.handle (/home/ec2-user/klambert/node_modules/express/lib/router/index.js:176:3)
    at router (/home/ec2-user/klambert/node_modules/express/lib/router/index.js:46:12)
    at Layer.handle [as handle_request] (/home/ec2-user/klambert/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/home/ec2-user/klambert/node_modules/express/lib/router/index.js:312:13)
    at /home/ec2-user/klambert/node_modules/express/lib/router/index.js:280:7