PenciDesign replied
Hi,
Recently, Instagram just updated the API, so all websites has much request to Instagram in a fixed time will get blocked.
That makes Instagram images cant' load for your site. No problems, you can install this plugin: https://wordpress.org/plugins/instagram-feed/
After that, go to Dashboard > Instagram Feed > connect with your Instagram account and use shortcode from that plugin to display it.
You can make shortcode display by drag & drop "Text" widget to the sidebar and paste the shortcode to that widget.
Best Regards,
PenciDesign