Index: openacs-4/packages/xowiki/tcl/tree-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/tree-procs.tcl,v
diff -u -r1.23.2.6 -r1.23.2.7
--- openacs-4/packages/xowiki/tcl/tree-procs.tcl	7 Aug 2020 10:30:57 -0000	1.23.2.6
+++ openacs-4/packages/xowiki/tcl/tree-procs.tcl	15 Oct 2020 06:38:00 -0000	1.23.2.7
@@ -410,9 +410,11 @@
         ::xo::Page requireCSS urn:ad:css:yui2:treeview/assets/$style/tree
       }
     }
+    ::xo::Page requireJS urn:ad:js:yui2:yahoo/yahoo-min
     ::xo::Page requireJS urn:ad:js:yui2:yahoo-dom-event/yahoo-dom-event
 
     if {$ajax} {
+      ::xo::Page requireJS urn:ad:js:yui2:event/event-min
       ::xo::Page requireJS urn:ad:js:yui2:connection/connection-min
       ::xo::Page requireJS urn:ad:js:yui2:animation/animation-min
     }
Index: openacs-4/packages/xowiki/tcl/yui-init.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/yui-init.tcl,v
diff -u -r1.2.2.1 -r1.2.2.2
--- openacs-4/packages/xowiki/tcl/yui-init.tcl	13 Jul 2020 12:02:34 -0000	1.2.2.1
+++ openacs-4/packages/xowiki/tcl/yui-init.tcl	15 Oct 2020 06:38:00 -0000	1.2.2.2
@@ -21,18 +21,20 @@
 # manually, where we can get it
 #
 set YUI_JS_PATHS {
-    animation/animation-min
-    autocomplete/autocomplete-min
-    button/button-min
-    connection/connection-min
-    container/container-min
-    datasource/datasource-min
-    datatable/datatable-min
-    menu/menu-min
-    selector/selector-min
-    treeview/treeview-min
-    utilities/utilities
-    yahoo-dom-event/yahoo-dom-event
+  animation/animation-min
+  autocomplete/autocomplete-min
+  button/button-min
+  connection/connection-min
+  container/container-min
+  datasource/datasource-min
+  datatable/datatable-min
+  event/event-min
+  menu/menu-min
+  selector/selector-min
+  treeview/treeview-min
+  utilities/utilities
+  yahoo-dom-event/yahoo-dom-event
+  yahoo/yahoo-min
 }