Help setting up katalon to run with saucelabs

I have just created an account in saucelabs to attempt connection with Katalon. The system being tested is in my company’s internal network.
After setting up the Sauce Connect Proxy on my machine, I am able to run a test manually. But when I try to run the same test from Katalon, the execution job seems to start well, but the test always fails, because the behavior of the job in saucelabs is always a browser with the message “this site can’t be reached”.
I am supposing that this is technically possible.
Could I have some help with this issue, to figure out what may be the problem?
Thanks and regards,