Cannot read property 'apply' of undefined

How can I best fix this?

ssb@secretislands:~$ ssb-server friends
Cannot read property 'apply' of undefined
ssb@secretislands:~$ ssb-server friends.following 
Command not found: friends.following
Cannot read property 'apply' of undefined
ssb@secretislands:~$ ssb-server following
Command not found: following
Cannot read property 'apply' of undefined
ssb@secretislands:~$ ssb-server 
Cannot read property 'apply' of undefined

@dangerousbeans

See: https://github.com/ssbc/ssb-server/issues/634