Hi, I spent a lot of time trying to figure this out but for some reason I cannot.
I get an error 500 message when starting a job:

16:17:09 web.1 | 2018-11-19 16:17:09 - NoMethodError - undefined method hash_id' for nil:NilClass: 16:17:09 web.1 | /home/apuser/repos/hashview/helpers/build_crack_cmd.rb:20:in buildCrackCmd'
16:17:09 web.1 | /home/apuser/repos/hashview/routes/jobs.rb:405:in block (2 levels) in <top (required)>' 16:17:09 web.1 | /home/apuser/repos/hashview/routes/jobs.rb:391:in each'
16:17:09 web.1 | /home/apuser/repos/hashview/routes/jobs.rb:391:in block in <top (required)>' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:1611:in call'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:1611:in block in compile!' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:975:in []'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:975:in block (3 levels) in route!' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:994:in route_eval'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:975:in block (2 levels) in route!' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:1015:in block in process_route'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:1013:in catch' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:1013:in process_route'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:973:in block in route!' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:972:in each'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:972:in route!' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:1085:in block in dispatch!'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:1067:in block in invoke' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:1067:in catch'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:1067:in invoke' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:1082:in dispatch!'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:907:in block in call!' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:1067:in block in invoke'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:1067:in catch' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:1067:in invoke'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:907:in call!' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:895:in call'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/rack-protection-1.5.3/lib/rack/protection/xss_header.rb:18:in call' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/rack-protection-1.5.3/lib/rack/protection/base.rb:49:in call'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/rack-protection-1.5.3/lib/rack/protection/base.rb:49:in call' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/rack-protection-1.5.3/lib/rack/protection/path_traversal.rb:16:in call'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/rack-protection-1.5.3/lib/rack/protection/json_csrf.rb:18:in call' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/rack-protection-1.5.3/lib/rack/protection/base.rb:49:in call'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/rack-protection-1.5.3/lib/rack/protection/base.rb:49:in call' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/rack-protection-1.5.3/lib/rack/protection/frame_options.rb:31:in call'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/rack-1.6.5/lib/rack/session/abstract/id.rb:225:in context' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/rack-1.6.5/lib/rack/session/abstract/id.rb:220:in call'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/rack-1.6.5/lib/rack/logger.rb:15:in call' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/rack-1.6.5/lib/rack/commonlogger.rb:33:in call'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:219:in call' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:212:in call'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/rack-1.6.5/lib/rack/head.rb:13:in call' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/rack-1.6.5/lib/rack/methodoverride.rb:22:in call'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:182:in call' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:2013:in call'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:1487:in block in call' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:1787:in synchronize'
16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/sinatra-1.4.7/lib/sinatra/base.rb:1487:in call' 16:17:09 web.1 | /home/apuser/.rvm/gems/ruby-2.2.2/gems/rack-1.6.5/lib/rack/handler/webrick.rb:88:in service'
16:17:09 web.1 | /usr/share/rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/webrick/httpserver.rb:138:in service' 16:17:09 web.1 | /usr/share/rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/webrick/httpserver.rb:94:in run'
16:17:09 web.1 | /usr/share/rvm/rubies/ruby-2.2.2/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'
16:17:09 web.1 | 10.0.1.122 - - [19/Nov/2018:16:17:09 +0100] "GET /jobs/start/2 HTTP/1.1" 500 30 0.0050
16:17:09 web.1 | 10.0.1.122 - - [19/Nov/2018:16:17:09 CET] "GET /jobs/start/2 HTTP/1.1" 500 30


I am running hashcat 5.0 (should not be an issue) and ubuntu 16.04.5.