Please help with opening Katalon Studio
Just double click the starter icon.
Any more question?
Then have a look at the following guidance and describe your problem.
When you create a test project, you are supposed to chose a Type of project: Web, API, Mobile, Desktop, Generic.
Which type did you actually select? Which type do you really desire to select?
It seems that you desire “Web” type but actually you selected “Mobile” type, therefore you got an error “unable to start an application”.
You can not change the Type of an existing project.
So you have to create a new project to work on a WebUI testing.
And what is your problem? You haven’t stated anything.
No question? OK, then.
I changed the post’s title:
was “I cannot open Katalon Studio” → changed to “I can not start Desktop app in Katalon Studio”
I don’t know anything about Desktop testing in Katalon Studio.