Fatal error: Cannot declare class WP_Metadata_Lazyloader, because the name is already in use in /storage/content/39/2002539/houseofpoker.se/public_html/wp-includes/class-wp-metadata-lazyloader.php on line 32

Fatal error: Uncaught Error: Call to a member function set() on null in /storage/content/39/2002539/houseofpoker.se/public_html/wp-includes/l10n.php:806
Stack trace:
#0 /storage/content/39/2002539/houseofpoker.se/public_html/wp-includes/l10n.php(900): load_textdomain('default', '/storage/conten...', 'sv_SE')
#1 /storage/content/39/2002539/houseofpoker.se/public_html/wp-includes/class-wp-fatal-error-handler.php(47): load_default_textdomain()
#2 [internal function]: WP_Fatal_Error_Handler->handle()
#3 {main}
  thrown in /storage/content/39/2002539/houseofpoker.se/public_html/wp-includes/l10n.php on line 806