Level3: Cannot find the UI element corresponding to this selector


Hi I am facing the issue of selector
it shows following messege while accessing SHA-1 Online:

Activate ‘HTML http://www.sha1-o…’: Cannot find the UI element corresponding to this selector:

I presume, the SHA1 browser window is not available. You first have to have the application open (Eg: using Open browser). Activate will bring the window to the foreground.