Have a look at the following discussion just for your interest.
Katalon Studio Version 6.3.3 implemented my proposal.
Since ver 6.3.3 we have -Dfile.encoding=utf-8 in the katalon.ini — does it solve this topic Object with French Accent will not verify element present?
I am not sure. This topic did not tell which URL to check against. So I can not reproduce their problem.