Index: src/wp-includes/js/media-views.js
===================================================================
--- src/wp-includes/js/media-views.js	(revision 40996)
+++ src/wp-includes/js/media-views.js	(working copy)
@@ -8228,13 +8228,13 @@
 	},
 	show: function() {
 		this.$el.removeClass( 'hidden' );
-		if ( this.controller.$uploaderToggler.length ) {
+		if ( this.controller.$uploaderToggler && this.controller.$uploaderToggler.length ) {
 			this.controller.$uploaderToggler.attr( 'aria-expanded', 'true' );
 		}
 	},
 	hide: function() {
 		this.$el.addClass( 'hidden' );
-		if ( this.controller.$uploaderToggler.length ) {
+		if ( this.controller.$uploaderToggler && this.controller.$uploaderToggler.length ) {
 			this.controller.$uploaderToggler
 				.attr( 'aria-expanded', 'false' )
 				// Move focus back to the toggle button when closing the uploader.