Hmm I am not familiar with Watson Studio so perhaps you need to do some special login to establish a connection?
If you’re running on a Linux machine, you can edit the no_proxy environment variable in the same shell that you’re running your code from, e.g. bash - Set a network range in the no_proxy environment variable - Unix & Linux Stack Exchange 59
However, my guess is that you might have more luck getting in touch with the IBM support to help you solve the problem