Katalon can't locate object

I am running my Test suite and I have that kind of log
=============== ROOT CAUSE =====================
Caused by: com.kms.katalon.core.webui.exception.WebElementNotFoundException: Web element with id: ‘Object Repository/Params/DescriptionAera’ located by ‘//div[@senchatest=‘tab_params_description’]//textarea’ not found
I have senchatest located in there ant it look like this

<div class="description" style="margin: 0px !important; min-height: 400px; max-height: 400px; width: 100%; height: 500px; flex: 1 1 0%;" senchatest="tab_params_description">

can someone tell me what I may do wrong?

Does your web page use <iframe> somewhere?

Yes, text editor where I want to put my desctiption is iframe

Then you need to learn SwitchToFrame keyword