Test Script fails on Dropdown embedded in Website Modal

I’m having a lot of issues selecting a drop down that appears on a modal in our website. I have recorded the selection of the dropdown and referenced it the recorded element from the Katalon Object Respository. However, it fails to select an option in the drop down list so the “Add” button can be selected and make the modal disappear. Anyone have tips for dropdowns in modals? See picture of the modal below.

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can you also post exceprion you are recieving and html of that popup, thanx