Parse error: syntax error, unexpected token "class", expecting "function" or "fn" or "static" or "#[" in /customers/d/6/8/dftvzw.be/httpd.www/wp-includes/class-wp-locale.php on line 15

Fatal error: Uncaught Error: Call to a member function set() on null in /customers/d/6/8/dftvzw.be/httpd.www/wp-includes/l10n.php:856
Stack trace:
#0 /customers/d/6/8/dftvzw.be/httpd.www/wp-includes/l10n.php(959): load_textdomain('default', '/customers/d/6/...', 'nl_NL')
#1 /customers/d/6/8/dftvzw.be/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/d/6/8/dftvzw.be/httpd.www/wp-includes/l10n.php on line 856