Testing in MS Edge fails

When i try to run any test in the Microsoft Edge browser, i get the following error. I’ve made sure that the Katalon Studio web driver for edge matches the driver on my machine.

Test Cases/Test1 FAILED because (of) (Stack trace: com.kms.katalon.core.exception.StepFailedException: Unable to open browser with url: '' (Root cause: org.openqa.selenium.WebDriverException: Unable to parse remote response: Unknown errorBuild info: version: '3.7.1', revision: '8a0099a', time: '2017-11-06T21:07:36.161Z'System info: host: 'DESKTOP-HTPVMFO', ip: '', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_181'Driver info: driver.version: CEdgeDriver)

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The error states the URL is empty or Null…

Where is the URL defined in your scripts?

In the project when i created it. If i launch in Fireforx or Chrome it works fine. It is only in Edge it fails.


I’m currently having the same issue, it worked previously then I had to change some config for another browser and it has stopped.

It started when Microsoft switched the WebDriver to a feature on demand ressource. Since then I wasn´t able to execute tests on Edge because of above error. Before that everything worked fine when WebDriver.exe in the ressource/driver folder of Katalon was replaced by the correct OS/Edge version. But now even if the correct version is set up it leads to this failure.

I thought the fail is obvious but after 3 Katalon releases without any fix I assume the majority of users does not have such issues.

Are there any solutions for this or is at least the Katalon Crew aware of this problem?


Is there someone who had a fix for this issue?