Server address: http://0.0.0.0:4001
#<Thread:0x000056116f4fb038@/usr/lib/ruby/vendor_ruby/jekyll/commands/serve/live_reload_reactor.rb:41 run> terminated with exception (report_on_exception is true):
Traceback (most recent call last):
        5: from /usr/lib/ruby/vendor_ruby/jekyll/commands/serve/live_reload_reactor.rb:44:in `block in start'
        4: from /usr/lib/ruby/vendor_ruby/eventmachine.rb:187:in `run'
        3: from /usr/lib/ruby/vendor_ruby/eventmachine.rb:187:in `run_machine'
        2: from /usr/lib/ruby/vendor_ruby/jekyll/commands/serve/live_reload_reactor.rb:47:in `block (2 levels) in start'
        1: from /usr/lib/ruby/vendor_ruby/eventmachine.rb:526:in `start_server'
/usr/lib/ruby/vendor_ruby/eventmachine.rb:526:in `start_tcp_server': no acceptor (port is in use or requires root privileges) (RuntimeError)
Traceback (most recent call last):
        5: from /usr/lib/ruby/vendor_ruby/jekyll/commands/serve/live_reload_reactor.rb:44:in `block in start'
        4: from /usr/lib/ruby/vendor_ruby/eventmachine.rb:187:in `run'
        3: from /usr/lib/ruby/vendor_ruby/eventmachine.rb:187:in `run_machine'
        2: from /usr/lib/ruby/vendor_ruby/jekyll/commands/serve/live_reload_reactor.rb:47:in `block (2 levels) in start'
        1: from /usr/lib/ruby/vendor_ruby/eventmachine.rb:526:in `start_server'
/usr/lib/ruby/vendor_ruby/eventmachine.rb:526:in `start_tcp_server': no acceptor (port is in use or requires root privileges) (RuntimeError)
make: *** [Makefile:19: server] Error 1