How to handle "This element is not interactable through selenium(automation) as it is not visible in UI." in Selenium Webdriver

Question

I'm trying to close the modal that pops up when opening a netbanking website. But I'm unable to identify the modal. Selectors hub shows the above error.

<div class="popup" id="popup" style="display": block;" xpath="1">
<div class="close-btn" data-bind="click:$component.closePopup" style="" xpath="1">x</div>