Update MultiSelect.vue

src/components/multiselect/MultiSelect.vue

@@ -187,7 +187,7 @@ export default {
         onHeaderCheckboxBlur() {
             this.headerCheckboxFocused = false;
         },
-        onClick() {
+        onClick(event) {
             if (!this.disabled && (!this.$refs.overlay || !this.$refs.overlay.contains(event.target)) && !DomHandler.hasClass(event.target, 'p-multiselect-close')) {
                 if (this.overlayVisible)
                     this.hide();