Hi

After upgrading to Umbraco 6.1.6, the Tree multi picker UI is broken, any solution for this?

--------------------------------------------------------------

Method not found: 'System.String umbraco.cms.presentation.Trees.BaseTree.GetTreeServiceUrl(System.Object)'.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.MissingMethodException: Method not found: 'System.String umbraco.cms.presentation.Trees.BaseTree.GetTreeServiceUrl(System.Object)'.

Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace: 

[MissingMethodException: Method not found: 'System.String umbraco.cms.presentation.Trees.BaseTree.GetTreeServiceUrl(System.Object)'.]

   treeMultiPicker.treeMultiPickerInit.Page_Load(Object sender, EventArgs e) +0

   umbraco.BasePages.BasePage.OnLoad(EventArgs e) +19