Advice on Katalon failure on valid Locator

  1. Open the web page in your browser.

  2. Open the browser DevTools.

  3. In the console tab, type this:

document.querySelectorAll("one-app-nav-bar a[title=Leads] > span").length

If it returns 1, then change your Test Object ClickLead to use CSS and provide it with this selector:

one-app-nav-bar a[title=Leads] > span

Let me know what happens.