EADDRINUSE error nodejs [fast help pls]

so i wanted to setup a gambling site and wanted to check prices with nodejs, but this isnt really working.. can anybody help me?

everytime i try nodejs site this pops up:

root@localhost:/var/www/html/Bot/BOT# nodejs site
[2017-05-04 14:50:45.177] [TRACE] [default] - Strange error
[2017-05-04 14:50:45.179] [DEBUG] [default] - { [Error: listen EADDRINUSE] code: 'EADDRINUSE', errno: 'EADDRINUSE', syscall: 'listen' }
Error: listen EADDRINUSE
    at errnoException (net.js:901:11)
    at Server._listen2 (net.js:1039:14)
    at listen (net.js:1061:10)
    at Server.listen (net.js:1135:5)
    at Server.listen.Server.attach (/var/www/html/Bot/BOT/node_modules/socket.io/lib/index.js:228:9)
    at new Server (/var/www/html/Bot/BOT/node_modules/socket.io/lib/index.js:52:17)
    at Server (/var/www/html/Bot/BOT/node_modules/socket.io/lib/index.js:40:41)
    at Object.<anonymous> (/var/www/html/Bot/BOT/site.js:3:30)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
[2017-05-04 14:50:45.195] [INFO] [default] - DB Connection ID: 184
[2017-05-04 14:50:45.197] [INFO] [default] - DB Connection ID: 185
[2017-05-04 14:50:45.197] [INFO] [default] - DB Connection ID: 186
[2017-05-04 14:50:45.198] [INFO] [default] - DB Connection ID: 187
[2017-05-04 14:50:45.199] [TRACE] [default] - Roll 1
[2017-05-04 14:50:45.200] [TRACE] [default] - Sucesfully updated history
[2017-05-04 14:50:45.200] [WARN] [default] - Loaded hash594b7214a8e846d02a0187421148940170d2fcf18199f81721c082ca84d93808
[2017-05-04 14:50:45.539] [WARN] [default] - Loaded fresh prices
[2017-05-04 14:50:45.548] [WARN] [default] - Prices loaded from cache
[2017-05-04 14:50:48.174] [TRACE] [default] - Strange error
[2017-05-04 14:50:48.174] [DEBUG] [default] - { [Error: listen EADDRINUSE] code: 'EADDRINUSE', errno: 'EADDRINUSE', syscall: 'listen' }
Error: listen EADDRINUSE
    at errnoException (net.js:901:11)
    at Server._listen2 (net.js:1039:14)
    at listen (net.js:1061:10)
    at Server.listen (net.js:1135:5)
    at Server.listen.Server.attach (/var/www/html/Bot/BOT/node_modules/socket.io/lib/index.js:228:9)
    at null._onTimeout (/var/www/html/Bot/BOT/site.js:618:29)
    at Timer.listOnTimeout [as ontimeout] (timers.js:110:15)

via Noél M.