 ‘node’: No such file or directory

Hello! Fisrt off, thank you so much for making this! I've been looking for something like this for a while. I have 3 servers I need to sync, as If i take one down for maint, i can have the user use one of the other 2 without any issues. 

I have installed as per instructinos, but when i try and run, i get:
/usr/bin/env: ‘node’: No such file or directory

And that's it...any ideas?