root@kali:~# bettercap
/var/lib/gems/2.1.0/gems/bettercap-1.5.8/lib/bettercap/spoofers/icmp.rb:24:in `<class:ICMPRedirectPacket>': uninitialized constant PacketFu::EthHeaderMixin (NameError)
	from /var/lib/gems/2.1.0/gems/bettercap-1.5.8/lib/bettercap/spoofers/icmp.rb:17:in `<module:Spoofers>'
	from /var/lib/gems/2.1.0/gems/bettercap-1.5.8/lib/bettercap/spoofers/icmp.rb:15:in `<module:BetterCap>'
	from /var/lib/gems/2.1.0/gems/bettercap-1.5.8/lib/bettercap/spoofers/icmp.rb:14:in `<top (required)>'
	from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/lib/gems/2.1.0/gems/bettercap-1.5.8/lib/bettercap.rb:66:in `block in bettercap_autoload'
	from /var/lib/gems/2.1.0/gems/bettercap-1.5.8/lib/bettercap.rb:65:in `each'
	from /var/lib/gems/2.1.0/gems/bettercap-1.5.8/lib/bettercap.rb:65:in `bettercap_autoload'
	from /var/lib/gems/2.1.0/gems/bettercap-1.5.8/lib/bettercap.rb:70:in `<top (required)>'
	from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /var/lib/gems/2.1.0/gems/bettercap-1.5.8/bin/bettercap:16:in `<top (required)>'
	from /usr/local/bin/bettercap:23:in `load'
	from /usr/local/bin/bettercap:23:in `<main>'