i fix problem

[vorlon001]

[Error] TypeError: Argument 1 ('refNode') to Range.setEnd must be an instance of Node
setEnd (materialNote.js:1602)
nativeRange (materialNote.js:1602)
select (materialNote.js:1647)
toggleList (materialNote.js:3139)
insertUnorderedList (materialNote.js:3036)
insertUnorderedList (materialNote.js:3729)
hToolbarAndPopoverClick (materialNote.js:5630)
dispatch (jquery-2.1.4.js:4435)
handle (jquery-2.1.4.js:4121)