NoMethodError - undefined method root' for nil:NilClass: /var/lib/gems/2.7.0/gems/sequenceserver-1.0.14/lib/sequenceserver/blast/report.rb:38:in generate’ /var/lib/gems/2.7.0/gems/sequenceserver-1.0.14/lib/sequenceserver/blast/report.rb:21:in initialize' /var/lib/gems/2.7.0/gems/sequenceserver-1.0.14/lib/sequenceserver/blast.rb:96:in new’ /var/lib/gems/2.7.0/gems/sequenceserver-1.0.14/lib/sequenceserver/blast.rb:96:in run' /var/lib/gems/2.7.0/gems/sequenceserver-1.0.14/lib/sequenceserver/routes.rb:135:in block in class:Routes’ /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1611:in call' /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1611:in block in compile!’ /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:975:in block (3 levels) in route!' /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:994:in route_eval’ /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:975:in block (2 levels) in route!' /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1015:in block in process_route’ /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1013:in catch' /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1013:in process_route’ /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:973:in block in route!' /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:972:in each’ /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:972:in route!' /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1085:in block in dispatch!’ /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1067:in block in invoke' /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1067:in catch’ /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1067:in invoke' /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1082:in dispatch!’ /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:907:in block in call!' /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1067:in block in invoke’ /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1067:in catch' /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1067:in invoke’ /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:907:in call!' /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:895:in call’ /var/lib/gems/2.7.0/gems/rack-1.6.13/lib/rack/head.rb:13:in call' /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:182:in call’ /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:2013:in call' /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1487:in block in call’ /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1787:in synchronize' /var/lib/gems/2.7.0/gems/sinatra-1.4.8/lib/sinatra/base.rb:1487:in call’ /var/lib/gems/2.7.0/gems/sequenceserver-1.0.14/lib/sequenceserver.rb:96:in call' /var/lib/gems/2.7.0/gems/rack-1.6.13/lib/rack/handler/webrick.rb:88:in service’ /usr/lib/ruby/2.7.0/webrick/httpserver.rb:140:in service' /usr/lib/ruby/2.7.0/webrick/httpserver.rb:96:in run’ /usr/lib/ruby/2.7.0/webrick/server.rb:307:in `block in start_thread’