diff --git a/vospace-ui-backend/src/main/java/it/inaf/ia2/vospace/ui/service/NodesHtmlGenerator.java b/vospace-ui-backend/src/main/java/it/inaf/ia2/vospace/ui/service/NodesHtmlGenerator.java
index e45c778e6675acbf48a6d2315edf693ccfc5f1de..bffec0a8b066ee492c78241a0a2f1d353ba9fe1c 100644
--- a/vospace-ui-backend/src/main/java/it/inaf/ia2/vospace/ui/service/NodesHtmlGenerator.java
+++ b/vospace-ui-backend/src/main/java/it/inaf/ia2/vospace/ui/service/NodesHtmlGenerator.java
@@ -102,10 +102,12 @@ public class NodesHtmlGenerator {
         List<String> personGroups = new ArrayList<>();
         List<String> peopleGroups = new ArrayList<>();
         for (String value : values) {
-            if (value.startsWith("people.")) {
-                personGroups.add(value.substring("people.".length()).replace("\\.", "."));
-            } else {
-                peopleGroups.add(value);
+            if (!value.isBlank()) {
+                if (value.startsWith("people.")) {
+                    personGroups.add(value.substring("people.".length()).replace("\\.", "."));
+                } else {
+                    peopleGroups.add(value);
+                }
             }
         }
         if (!personGroups.isEmpty()) {
diff --git a/vospace-ui-backend/src/main/java/it/inaf/ia2/vospace/ui/service/SharingService.java b/vospace-ui-backend/src/main/java/it/inaf/ia2/vospace/ui/service/SharingService.java
index 535ef433167f082edae95c484f3b10a8e0c9d1c6..8abb1a9fe16544b68b3d3ef22a54d8f714141cc3 100644
--- a/vospace-ui-backend/src/main/java/it/inaf/ia2/vospace/ui/service/SharingService.java
+++ b/vospace-ui-backend/src/main/java/it/inaf/ia2/vospace/ui/service/SharingService.java
@@ -195,7 +195,7 @@ public class SharingService {
                 if (identity.getType() == IdentityType.EDU_GAIN
                         && identity.getEppn().endsWith("@" + trustedEppnScope)) {
                     String username = identity.getEppn().substring(0, identity.getEppn().indexOf("@"));
-                    existingUsers.put(user.getId(), username);
+                    existingUsers.put(user.getId(), username.toLowerCase());
                     break;
                 }
             }
diff --git a/vospace-ui-frontend/src/App.vue b/vospace-ui-frontend/src/App.vue
index cc2e8ecfe566c4f3871d28a8eea9ed4c9d7f98ca..6750c693f1388b7b7a41278d3030ba08f858f8ad 100644
--- a/vospace-ui-frontend/src/App.vue
+++ b/vospace-ui-frontend/src/App.vue
@@ -7,7 +7,7 @@
   <div id="footer-fix"></div>
   <footer class="text-center" id="site-footer">
     —&nbsp;Powered by <img alt="IA2 logo" src="./assets/ia2-logo-footer.png">
-    <strong class="text-primary"><a href="http://www.ia2.inaf.it/" target="blank_">IA2</a></strong>&nbsp;—
+    <strong class="text-primary"><a href="http://www.ia2.inaf.it/" target="_blank">IA2</a></strong>&nbsp;—
   </footer>
   <div id="loading" v-if="loading" class="loading">
     <div class="spinner-wrapper">
diff --git a/vospace-ui-frontend/src/components/modal/ShareModal.vue b/vospace-ui-frontend/src/components/modal/ShareModal.vue
index c07803d8c47865f7f112f9c77bdd5dab94cb11ea..421986f7b28dd1b4ea14443c795002d6d598051f 100644
--- a/vospace-ui-frontend/src/components/modal/ShareModal.vue
+++ b/vospace-ui-frontend/src/components/modal/ShareModal.vue
@@ -52,7 +52,7 @@ export default {
       groupArr.splice(0, groupArr.length);
       for (let group of nodeArr.split(' ')) {
         if (group.startsWith('people.')) {
-          userArr.push(group.substring('people.'.length).replaceAll('\\\\', '\\'));
+          userArr.push(group.substring('people.'.length).replaceAll('\\', ''));
         } else if (group.trim() !== '') {
           groupArr.push(group.replaceAll('\\\\', '\\'));
         }