application crashing when requiring package

[33Fraise33]

Hello,

My application is crashing the moment I put in in the 'require'. It seems to be something with the use strict in your code. let is not allowed to be used when you are using strict mode.

Removing the strict mode I get an 'unexpected identifier on the first word: Connection.

[randunel]

Hello,

What node version are you using?

node --version