I'll add this here, because I had the same issue today, which was answered in another message later in this same forum.
In CourseLab 2.4, when you enter your URL in the External URL action, e.g. http://www.pixelparadox.com
you must put quotation marks around it, e.g.
"http://www.pixelparadox.com"
This will result in the Action looking like this:
EXERNAL URL(URL=""http://www.pixelparadox.com/"")
(Notice the double quotes now.)
It works in Chrome, IE, and Firefox.
Good luck.
I'll add this here, because I had the same issue today, which was answered in another message later in this same forum.
In CourseLab 2.4, when you enter your URL in the External URL action, e.g. http://www.pixelparadox.com
you must put quotation marks around it, e.g.
"http://www.pixelparadox.com"
This will result in the Action looking like this:
EXERNAL URL(URL=""http://www.pixelparadox.com/"")
(Notice the double quotes now.)
It works in Chrome, IE, and Firefox.
Good luck.