Ошибка типа: невозможно скопировать NilClass из /scratch/rvm_details/gems/ruby-2.1.4/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/w3c_capabilities.rb:101: в dup'
from /scratch/rvm_details/gems/ruby-2.1.4/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/w3c_capabilities.rb:101:in json_create 'из /scratch/rvm_details/gems/ruby-2.1.4/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/w3c_bridge.rb:116:in create_session'
from /scratch/rvm_details/gems/ruby-2.1.4/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/remote/w3c_bridge.rb:76:in initialize 'из /scratch/rvm_details/gems/ruby-2.1.4/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/firefox/w3c_bridge.rb:45:in initialize'
from /scratch/rvm_details/gems/ruby-2.1.4/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver/common/driver.rb:52:in new' из / scratch / rvm_details / gems / ruby -2.1.4 / gems / selenium-webdriver-3.3.0 / lib / selenium / webdriver / common / driver.rb: 52: в for'
from /scratch/rvm_details/gems/ruby-2.1.4/gems/selenium-webdriver-3.3.0/lib/selenium/webdriver.rb:87:in for 'from / scratch / rvm_details / gems / ruby -2.1.4 / gems / capybara-2.4.4 / lib / capybara / selenium / driver.rb: 13: в browser'
from /scratch/rvm_details/gems/ruby-2.1.4/gems/capybara-2.4.4/lib/capybara/selenium/driver.rb:45:in посещение 'из /scratch/rvm_details/gems/ruby-2.1. 4 / gems / capybara-2.4.4 / lib / capybara / session.rb: 227: в visit'
from /scratch/rvm_details/gems/ruby-2.1.4/gems/capybara-2.4.4/lib/capybara/dsl.rb:51:in блоке (2 уровня) в 'from (irb): 13 из /scratch/rvm_details/rubies/ruby-2.1 .4 / bin / irb: 11: in `'