最近我已经安装了gem 'webdrivers','~> 4.0'并尝试启动Chrome浏览器。但这不起作用。

代码：

@app = Driver.new(Capybara::Session.new(:selenium_chrome))
Webdrivers::Chromedriver.current_version

错误日志：

An error occurred while loading ./spec/login_spec.rb.
Failure/Error: require_relative '../pages/nav_bar.rb'

SyntaxError:
  /Users/madhan_kumaravel/.rvm/gems/ruby-2.2.8/gems/webdrivers-4.1.2/lib/webdrivers/chrome_finder.rb:83: syntax error,unexpected '.'
  ....VersionInfo.ProductVersion")&.strip
  ...                               ^
  /Users/madhan_kumaravel/.rvm/gems/ruby-2.2.8/gems/webdrivers-4.1.2/lib/webdrivers/chrome_finder.rb:87: syntax error,unexpected '.'
          System.call(location,'--product-version')&.strip
                                                      ^
  /Users/madhan_kumaravel/.rvm/gems/ruby-2.2.8/gems/webdrivers-4.1.2/lib/webdrivers/chrome_finder.rb:91: syntax error,'--version')&.strip