An exception has been thrown during the rendering of a template ("")
You're searching in the URI for a param with a key called search:

{% set token = craft.request.getParam('search') %}


But the in the URI it's called token:

REQUEST_URI=/en/book/poll-availability?token=9923444c-13b4-41bb-b7ab-9e339277bacc&amp;iframe=true&amp;room-urns=


Therefore when it's not an AJAX request this passes:

{% if (not craft.request.isAjax and not token ) %}


And a 404 is thrown:

{% exit 404 %}