Fatal error: Cannot redeclare addslashes_gpc() (previously declared in /customers/1/5/4/australian-labradoodle.se/httpd.www/wp-includes/formatting.php:2848) in /customers/1/5/4/australian-labradoodle.se/httpd.www/wp-includes/deprecated.php on line 6503

Fatal error: Uncaught Error: Call to a member function set() on null in /customers/1/5/4/australian-labradoodle.se/httpd.www/wp-includes/l10n.php:857
Stack trace:
#0 /customers/1/5/4/australian-labradoodle.se/httpd.www/wp-includes/l10n.php(960): load_textdomain('default', '/customers/1/5/...', 'sv_SE')
#1 /customers/1/5/4/australian-labradoodle.se/httpd.www/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain()
#2 [internal function]: WP_Fatal_Error_Handler->handle()
#3 {main}
  thrown in /customers/1/5/4/australian-labradoodle.se/httpd.www/wp-includes/l10n.php on line 857