diff --git a/services/static-webserver/client/source/class/osparc/desktop/organizations/MembersList.js b/services/static-webserver/client/source/class/osparc/desktop/organizations/MembersList.js
index 91ef4845139..2f0a016a8df 100644
--- a/services/static-webserver/client/source/class/osparc/desktop/organizations/MembersList.js
+++ b/services/static-webserver/client/source/class/osparc/desktop/organizations/MembersList.js
@@ -137,12 +137,14 @@ qx.Class.define("osparc.desktop.organizations.MembersList", {
             const usersStore = osparc.store.Users.getInstance();
             selectedMembers.forEach(selectedMemberGId => promises.push(usersStore.getUser(selectedMemberGId)));
             Promise.all(promises)
-              .then(users => {
-                users.forEach(user => this.__addMember(user.getUsername()));
-              })
-              .catch(err => {
-                console.error(err);
+              .then(values => {
+                values.forEach(user => {
+                  if (user) {
+                    this.__addMember(user.getUsername());
+                  }
+                });
               })
+              .catch(console.error)
               .finally(collaboratorsManager.close());
           } else {
             collaboratorsManager.close();
diff --git a/services/static-webserver/client/source/class/osparc/store/Users.js b/services/static-webserver/client/source/class/osparc/store/Users.js
index 59da1a2fb9a..693df0b59c7 100644
--- a/services/static-webserver/client/source/class/osparc/store/Users.js
+++ b/services/static-webserver/client/source/class/osparc/store/Users.js
@@ -28,7 +28,7 @@ qx.Class.define("osparc.store.Users", {
   },
 
   members: {
-    fetchUser: function(groupId) {
+    __fetchUser: function(groupId) {
       const params = {
         url: {
           gid: groupId
@@ -41,14 +41,22 @@ qx.Class.define("osparc.store.Users", {
         });
     },
 
-    getUser: function(groupId, fetchIfNotFound = true) {
+    getUser: async function(groupId, fetchIfNotFound = true) {
       const userFound = this.getUsers().find(user => user.getGroupId() === groupId);
       if (userFound) {
-        return new Promise(resolve => resolve(userFound));
-      } else if (fetchIfNotFound) {
-        return this.fetchUser(groupId);
+        return userFound;
       }
-      return new Promise(reject => reject());
+      if (fetchIfNotFound) {
+        try {
+          const user = await this.__fetchUser(groupId);
+          if (user) {
+            return user;
+          }
+        } catch (error) {
+          console.error(error);
+        }
+      }
+      return null;
     },
 
     addUser: function(userData) {