SHUTDOWN ERROR: Array
(
    [type] => 1
    [message] => Uncaught Error: Call to undefined function astra_html_before() in /home/xmcpl/cmd.xmc.pl/wp-content/themes/astra/header.php:18
Stack trace:
#0 /home/xmcpl/cmd.xmc.pl/wp-includes/template.php(880): require_once()
#1 /home/xmcpl/cmd.xmc.pl/wp-includes/template.php(815): load_template('/home/xmcpl/cmd...', true, Array)
#2 /home/xmcpl/cmd.xmc.pl/wp-includes/general-template.php(48): locate_template(Array, true, true, Array)
#3 /home/xmcpl/cmd.xmc.pl/wp-content/themes/astra/single.php(15): get_header()
#4 /home/xmcpl/cmd.xmc.pl/wp-includes/template-loader.php(132): include('/home/xmcpl/cmd...')
#5 /home/xmcpl/cmd.xmc.pl/wp-blog-header.php(19): require_once('/home/xmcpl/cmd...')
#6 /home/xmcpl/cmd.xmc.pl/index.php(17): require('/home/xmcpl/cmd...')
#7 {main}
  thrown
    [file] => /home/xmcpl/cmd.xmc.pl/wp-content/themes/astra/header.php
    [line] => 18
)