: Invalid argument supplied for foreach() in for POPOVER plugin

Hi I have this error on site after activating the plugin.

From Source Code:
<b>Warning</b>
<b>/home/beyondperfect/public_html/wp-content/plugins/popover/inc/class-popup-base.php</b>
on line <b>636</b>

It breaks the layout and seems important error that needs to be fixed.

Kindly help.

Website: https://www.beyondperfect.com.sg/

Regards,
Berker