Read the official Contao announcements.
Contao 3.5.18 is available
by Leo Feyer
Contao version 3.5.18 is available. The bugfix release fixes several problems, including an issue with showing running events in the list of upcoming events and an issue with creating the administrator user in the install tool. In addition, the requests when rebuilding the search index are now run sequentially to prevent too many simultaneous requests.