BUI error "refused to connect" when browser control tries to open web page

Summary

On a tab with a browser control, the page opens fine when I'm in the .Net view, but won't open in BUI

Content

In my workspace, I have the need to have a few different browser windows load based on categories chosen on an incident.  So I set a default URL on a tab with the setting to delay page load.  When I go to the tab in the .Net desktop, the page loads fine.  I set a rule and when I change the category, the other page loads fine as well so the rule is working.

But, when I view that same workspace in BUI, I get the "refused to connect" error when I initially go to the tab with the browser control and the original URL.  The second URL comes up ok based on the rule with the category change.  But then when I change the category again to go back to the original URL, it gives me the same "refused to connect" error.