Great things are coming soon

Fatal error: Uncaught Error: Call to undefined function get_field() in /var/www/wp-content/themes/fosfoblockbase/extend/code-buynow.php:66 Stack trace: #0 /var/www/wp-includes/class-wp-hook.php(324): fosfoblock_cta_buynow_offcanvas('') #1 /var/www/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #2 /var/www/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #3 /var/www/wp-content/mu-plugins/vendor/wpex/godaddy-launch/includes/LiveSiteControl/template-coming-soon.php(121): do_action('wp_footer') #4 /var/www/wp-content/mu-plugins/vendor/wpex/godaddy-launch/includes/LiveSiteControl/LiveSiteControlProvider.php(333): include('/var/www/wp-con...') #5 /var/www/wp-includes/class-wp-hook.php(324): GoDaddy\WordPress\Plugins\Launch\LiveSiteControl\LiveSiteControlProvider->GoDaddy\WordPress\Plugins\Launch\LiveSiteControl\{closure}(Object(WP)) #6 /var/www/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array) #7 /var/www/wp-includes/plugin.php(565): WP_Hook->do_action(Array) #8 /var/www/wp-includes/class-wp.php(418): do_action_ref_array('parse_request', Array) #9 /var/www/wp-includes/class-wp.php(813): WP->parse_request('') #10 /var/www/wp-includes/functions.php(1336): WP->main('') #11 /var/www/wp-blog-header.php(16): wp() #12 /var/www/index.php(17): require('/var/www/wp-blo...') #13 {main} thrown in /var/www/wp-content/themes/fosfoblockbase/extend/code-buynow.php on line 66