Fatal error: Uncaught Error: Call to undefined function create_function() in /customers/2/c/5/treesys.se/httpd.www/wp-includes/pomo/translations.php:208
Stack trace:
#0 /customers/2/c/5/treesys.se/httpd.www/wp-includes/pomo/translations.php(269): Gettext_Translations->make_plural_form_function(2, '$n != 1')
#1 /customers/2/c/5/treesys.se/httpd.www/wp-includes/pomo/translations.php(69): Gettext_Translations->set_header('Plural-Forms', 'nplurals=2; plu...')
#2 /customers/2/c/5/treesys.se/httpd.www/wp-includes/pomo/mo.php(269): Translations->set_headers(Array)
#3 /customers/2/c/5/treesys.se/httpd.www/wp-includes/pomo/mo.php(48): MO->import_from_reader(Object(POMO_FileReader))
#4 /customers/2/c/5/treesys.se/httpd.www/wp-includes/l10n.php(586): MO->import_from_file('/customers/2/c/...')
#5 /customers/2/c/5/treesys.se/httpd.www/wp-includes/l10n.php(718): load_textdomain('really-simple-s...', '/customers/2/c/...')
#6 /customers/2/c/5/treesys.se/httpd.www/wp-admin/includes/plugin.php(130): load_plugin_textdomain('really-simple-s...', false, 'really-simple-s...')
#7 /customers/2/c/5/treesys.se/httpd.www/wp-admin/includes/plugin.php(104): _get_plugin_data_markup_translate('really-simple-s...', Array, true, true)
#8 /customers/2/c/5/treesys.se/httpd.www/wp-content/plugins/really-simple-ssl/rlrsssl-really-simple-ssl.php(90): get_plugin_data('/customers/2/c/...')
#9 /customers/2/c/5/treesys.se/httpd.www/wp-content/plugins/really-simple-ssl/rlrsssl-really-simple-ssl.php(48): REALLY_SIMPLE_SSL->setup_constants()
#10 /customers/2/c/5/treesys.se/httpd.www/wp-content/plugins/really-simple-ssl/rlrsssl-really-simple-ssl.php(121): REALLY_SIMPLE_SSL::instance()
#11 /customers/2/c/5/treesys.se/httpd.www/wp-includes/class-wp-hook.php(298): RSSSL('')
#12 /customers/2/c/5/treesys.se/httpd.www/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(NULL, Array)
#13 /customers/2/c/5/treesys.se/httpd.www/wp-includes/plugin.php(453): WP_Hook->do_action(Array)
#14 /customers/2/c/5/treesys.se/httpd.www/wp-settings.php(325): do_action('plugins_loaded')
#15 /customers/2/c/5/treesys.se/httpd.www/wp-config.php(72): require_once('/customers/2/c/...')
#16 /customers/2/c/5/treesys.se/httpd.www/wp-load.php(37): require_once('/customers/2/c/...')
#17 /customers/2/c/5/treesys.se/httpd.www/wp-blog-header.php(13): require_once('/customers/2/c/...')
#18 /customers/2/c/5/treesys.se/httpd.www/index.php(17): require('/customers/2/c/...')
#19 {main}
  thrown in /customers/2/c/5/treesys.se/httpd.www/wp-includes/pomo/translations.php on line 208