I\'m trying to run a selenium test which should work just fine (hasn\'t changed and used to work) but I\'m getting this strange error.
System.InvalidOperatio
I resolved this by updating my chrome driver to the latest version (v2.34 at the time of writing).
You can get the chromedriver here: https://sites.google.com/a/chromium.org/chromedriver/downloads
just download the .exe file then replace the chromedriver file in your project's selenium/bin folder.