Edit the file plugin/system/helixultimate/html/layouts/libraries/cms/html/bootstrap.php and add the following line in the popover method at line c. 269
Factory::getDocument()->addScriptOptions('bootstrap.popover', array($selector => $opt));
so that the block reads
$opt = (object) array_filter((array) $opt);
Factory::getDocument()->addScriptOptions('bootstrap.popover', array($selector => $opt));
static::$loaded[__METHOD__][$selector] = true;