Broken Header: DOMDocument Warning & Undefined Index Notice

We are in the final stages of building at: http://inspiredconcrete.com

—We are currently having this issue—

In the WP Dashboard, Highend started showing this: Warning:

DOMDocument::load(): http:// wrapper is disabled in the server configuration by allow_url_fopen=0 in /hermes/bosnaweb09a/b608/ipg.inspiredconcretecom/wp-content/themes/HighendWP/functions.php on line 106 Warning: DOMDocument::load(http://hb-themes.com/home/feed/): failed to open stream: no suitable wrapper could be found in /hermes/bosnaweb09a/b608/ipg.inspiredconcretecom/wp-content/themes/HighendWP/functions.php on line 106 Warning: DOMDocument::load(): I/O warning : failed to load external entity “http://hb-themes.com/home/feed/” in /hermes/bosnaweb09a/b608/ipg.inspiredconcretecom/wp-content/themes/HighendWP/functions.php on line 106
You are using Highend theme. Version 1.7.

2 of our public pages have broken headers, and display the message below on the page:

https://www.inspiredconcrete.com/shop/
https://www.inspiredconcrete.com/faq/

Notice: Undefined index: QUERY_STRING in /hermes/bosnaweb09a/b608/ipg.inspiredconcretecom/wp-content/themes/HighendWP/woocommerce/loop/orderby.php on line 14 Notice: Undefined index: QUERY_STRING in /hermes/bosnaweb09a/b608/ipg.inspiredconcretecom/wp-content/themes/HighendWP/woocommerce/loop/orderby.php on line 15

—The last changes we made to the site—

We switched from Braintree Sandbox, to Braintree Production (just an api info update)

We added Google Analytics tracking code to the appropriate place in Highend Theme Options (this has since been removed while troubleshooting this error)

Installed GAnalytics Dashboard plugin to display metrics inside the WP dashboard (this has since been deactivated while troubleshooting this error)

Can you help me?