<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function add_shortcode() in /public_html/wp-includes/media.php:2319
Stack trace:
#0 /public_html/wp-settings.php(236): require()
#1 /public_html/wp-config.php(96): require_once('/public_html/wp...')
#2 /public_html/wp-load.php(50): require_once('/public_html/wp...')
#3 /public_html/wp-blog-header.php(13): require_once('/public_html/wp...')
#4 /public_html/index.php(17): require('/public_html/wp...')
#5 {main}
  thrown in <b>/public_html/wp-includes/media.php</b> on line <b>2319</b><br />
<br />
<b>Fatal error</b>:  Uncaught Error: Call to a member function set() on null in /public_html/wp-includes/l10n.php:806
Stack trace:
#0 /public_html/wp-includes/l10n.php(900): load_textdomain('default', '/public_html/wp...', 'pl_PL')
#1 /public_html/wp-includes/class-wp-fatal-error-handler.php(47): load_default_textdomain()
#2 [internal function]: WP_Fatal_Error_Handler-&gt;handle()
#3 {main}
  thrown in <b>/public_html/wp-includes/l10n.php</b> on line <b>806</b><br />