EasyEngine help and info commands not working

When I try to run ee help or ee info --nginx it gives error.

root@instance-2:/home/khan# ee help
sh: 1: less: not found
root@instance-2:/home/khan# ee info --nginx
Error: ‘info’ is not a registered ee command. See ‘ee help’ for available commands.
root@instance-2:/home/khan#

I have same problem, anyone can help please.