I just created a connection to webfile and i am able to take data from the list of available table in that webfile in data connection.
I am using Qliksense Desktop 3.0
First try to reach the same URL from your machine and check if its launching,
when i gave some random name instead of ISO_4217 i got the same error, so the problem might be in accessing the URL from your machine.
Also can you check the log folder if any error got captured ?