UPDATE ......From Tuesday 8 April 2025 we have changed the way that Single Sign-on works on this wiki. Please see here for more information:
Update
...
If an event is hosted in Prague (or anywhere else not in NL) you need to include a custom invoice. To do this, check the file /usr/local/share/php/Webshop/Invoice.class.php and edit the file /usr/local/share/php/Webshop/Order.php and add your respective product Ids to the method in question. So for Prague, the method HasCsirt "hasCsirt" needs to include the product_ids of products in Prague.
...