Just adding to this, it looks like there is some iteration going on there.
This happens every second-ish: black-friday-sale-banner.min.js?ver=5.3.7:1 Uncaught TypeError: Cannot set properties of null (setting ‘textContent’) at t (black-friday-sale-banner.min.js?ver=5.3.7:1:119)
I think I found the issue.
class-advanced-posts-widget-utils.php line 899
$_tax_query = ”; should be changed to $_tax_query = [];
Cheers