Unable to open browser from groovy script running on Inteliji IDE

I am running my katalon groovy script on Intelji IDE, i am using a driver factory class to get my webdriver, but i keep getting the error 13:56:52.601 [main] DEBUG com.kms.katalon.core.webui.keyword.builtin.OpenBrowserKeyword - Opening browser
13:56:52.648 [main] ERROR com.kms.katalon.core.keyword.internal.KeywordMain - :x: Unable to open browser with url: ‘’ (Root cause: com.kms.katalon.core.exception.StepFailedException: Unable to open browser with url: ‘’

Kindly find full screenshot of the error

Here is my groovy script

Please is there any thing am not doing right.