Error: Failed to lookup view "error" in views directory "/var/www/html/wifi/views"
   at Function.render (/var/www/html/wifi/node_modules/express/lib/application.js:580:17)
   at ServerResponse.render (/var/www/html/wifi/node_modules/express/lib/response.js:1008:7)
   at /var/www/html/wifi/app.js:153:7
   at Layer.handle_error (/var/www/html/wifi/node_modules/express/lib/router/layer.js:71:5)
   at trim_prefix (/var/www/html/wifi/node_modules/express/lib/router/index.js:315:13)
   at /var/www/html/wifi/node_modules/express/lib/router/index.js:284:7
   at Function.process_params (/var/www/html/wifi/node_modules/express/lib/router/index.js:335:12)
   at next (/var/www/html/wifi/node_modules/express/lib/router/index.js:275:10)
   at /var/www/html/wifi/app.js:143:3
   at Layer.handle [as handle_request] (/var/www/html/wifi/node_modules/express/lib/router/layer.js:95:5)