After activating event+ in a wpmu+bp+wpml installation, all wpml pages routes stopped working and returned 404 error. It happened only with non-default language routes.
I think the problem is that Eab_EventsHub->check_rewrite_rules() method is cleaning rewrite_rules option. Adding a "return $value;" statement at the end of this method fix the problem (apparently).
Index: events-and-bookings.php (1.6.2)
@@ -1512,6 +1512,7 @@
+ return $value;