I noticed in
https://docs.katalon.com/katalon-studio/new/version-70.html#version-750---752
This mentioned that in 7.5.0-7.5.2
Improve Proxy Settings with two separate types, including Authentication and System proxies. Learn more
I tried ver 7.5.5 to evaluate this change. I used “Use system proxy configuration applied” for System roxy setting. This allowed my test cases could use Proxy Auto config to access web sites of both of private IP hostnames (http://172.23.4.56/…) and host of public hostnames (e.g., http://autdemo.katalon.com). I used “Manual proxy configuration” for Authentication Proxy setting. This allowed Katalon Studio to go through Activation processing and plugin reloading successfully.
I think that the problems in Katalon Studio concerning Proxy have been finally resolved. Good work, thank you.