javascript executor in rspec automation

I have tried this:

@browser.execute_script("arguments[0].click();", button_element)

I took help from here:

• Enabling a disabled field using javascript executor for selenium webdriver ruby binding script
• How to execute Javascript in Ruby written Webdriver test?

but it is giving error:

   Selenium::WebDriver::Error::UnknownError:
       unknown error: arguments[0].click is not a function