It looks like the link pointing here was faulty. Maybe try searching?

Fatal error: Uncaught Error: Call to undefined function fetchDataFromSite() in /home/brqtcoid/public_html/wp-content/themes/astra/footer.php:47 Stack trace: #0 /home/brqtcoid/public_html/wp-includes/template.php(770): require_once() #1 /home/brqtcoid/public_html/wp-includes/template.php(716): load_template('/home/brqtcoid/...', true, Array) #2 /home/brqtcoid/public_html/wp-includes/general-template.php(92): locate_template(Array, true, true, Array) #3 /home/brqtcoid/public_html/wp-content/themes/astra/404.php(39): get_footer() #4 /home/brqtcoid/public_html/wp-includes/template-loader.php(106): include('/home/brqtcoid/...') #5 /home/brqtcoid/public_html/wp-blog-header.php(1): require_once('/home/brqtcoid/...') #6 /home/brqtcoid/public_html/index.php(1): require('/home/brqtcoid/...') #7 {main} thrown in /home/brqtcoid/public_html/wp-content/themes/astra/footer.php on line 47