can't use fitur "add to note"

muh_sutri_mansyah

I can't use the fitur of "add to note" feature, please help.
https://s3.amazonaws.com/zotero.org/images/forums/u16035810/nx38jmqpbo1im3g8kukv.jpg

dstillman

You need to have a note open in the right-hand sidebar to add an annotation to a note.