diff --git a/ui/nuxeo-document-permissions/nuxeo-popup-permission.js b/ui/nuxeo-document-permissions/nuxeo-popup-permission.js
index 8c032844fa..bbe43bdb2a 100644
--- a/ui/nuxeo-document-permissions/nuxeo-popup-permission.js
+++ b/ui/nuxeo-document-permissions/nuxeo-popup-permission.js
@@ -194,7 +194,7 @@ import '../nuxeo-button-styles.js';
           </paper-dialog-scrollable>
 
           <div class="buttons">
-            <paper-button dialog-dismiss class="secondary" on-click="doCancel"
+            <paper-button dialog-dismiss class="secondary"
               >[[i18n('popupPermission.cancel')]]</paper-button
             >
             <dom-if if="{{!updatingACE}}">
@@ -273,6 +273,7 @@ import '../nuxeo-button-styles.js';
     }
 
     togglePopup() {
+      this.set('params.invalid', false);
       this.$.popupRight.toggle();
     }
 
@@ -288,11 +289,6 @@ import '../nuxeo-button-styles.js';
       this._doSend(true);
     }
 
-    doCancel() {
-      this.params = this._getResetParams();
-      this.set('params.invalid', false);
-    }
-
     _computeTitle() {
       if (this.updatingACE) {
         return this.i18n('popupPermission.updatePermission');
@@ -322,6 +318,7 @@ import '../nuxeo-button-styles.js';
       }
       if (!this.shareWithExternal && !this.params.username && (!this.params.users || this.params.users.length === 0)) {
         this.set('params.invalid', true);
+    
         return;
       }
 
@@ -353,6 +350,7 @@ import '../nuxeo-button-styles.js';
       if (this.updatingACE) {
         this.$.replaceOp.execute();
       } else {
+        this.set('params.invalid', false);
         this.$.createOp.execute();
       }