Selenium $ is not defined error

[sur...@mahaswami.com]

Hi,

Many times i am getting the following error, related to execute_script method.

Could someone explain what may be the cause of this error?

unknown error: $ is not defined
  (Session info: chrome=46.0.2490.80)
  (Driver info: chromedriver=2.20.353124 (035346203162d32c80f1dce587c8154a1efa0c3b),platform=Linux 3.13.0-24-generic x86_64)
./lib/page_objects/driver.rb:230:in `close_notifications'
./spec/publisher/start_single_manual_relative_project_spec.rb:67:in `(root)'
228      # This assumes you are in the context of the notifications window
229      # removing mini-profiler from overlay as it blocks the close button
     @web_driver.execute_script("$('div.profiler-results').remove();")
231      @web_driver.find_element(:css, "#overlay_nav a").click
232      sleep 1
233# gem install syntax to get syntax highlighting

Regards,

Suresh.