I use SoapUI Pro 5.1.2 on Win7 x32, and try to connect to Selenium Webdriver in Groovy TestStep.
For this purpose I added selenium-standalone-server.jar
I have encountered the same error, which said:
org.openqa.selenium.remote.UnreachableBrowserException: Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure.
but chromedriver.exe started fine. I can see it in task manager.
My environment is as following,
After many tries suggested in google results, my final solution is to add 127.0.0.1 localhost to C:\Windows\System32\drivers\etc\hosts.
Hope to help you!