diff --git a/attribute-endpoints-provider/src/main/java/de/ccc/hamburg/keycloak/attribute_endpoints/AdminUiPage.java b/attribute-endpoints-provider/src/main/java/de/ccc/hamburg/keycloak/attribute_endpoints/AdminUiPage.java
index cc2095f..f0cebc1 100644
--- a/attribute-endpoints-provider/src/main/java/de/ccc/hamburg/keycloak/attribute_endpoints/AdminUiPage.java
+++ b/attribute-endpoints-provider/src/main/java/de/ccc/hamburg/keycloak/attribute_endpoints/AdminUiPage.java
@@ -54,6 +54,10 @@ public class AdminUiPage implements UiPageProvider, UiPageProviderFactory<Compon
 
         Pattern slugPattern = Pattern.compile("^[a-zA-Z0-9_-]*$");
         String configAttributeSlug = model.getConfig().getFirst("slug");
+        if (configAttributeSlug == null) {
+            hasError = true;
+            errorString += " • [Slug] can not be empty\n";
+        }
 
         if (!slugPattern.matcher(configAttributeSlug).matches()) {
             hasError = true;
@@ -61,6 +65,11 @@ public class AdminUiPage implements UiPageProvider, UiPageProviderFactory<Compon
         }
 
         String configAuthRole = model.getConfig().getFirst("auth-role");
+        if (configAuthRole == null) {
+            hasError = true;
+            errorString += " • [Auth Role] can not be empty\n";
+        }
+
         RoleModel authRole = realm.getRole(configAuthRole);
         if (authRole == null) {
             hasError = true;
@@ -68,6 +77,11 @@ public class AdminUiPage implements UiPageProvider, UiPageProviderFactory<Compon
         }
 
         String configMatchRole = model.getConfig().getFirst("match-role");
+        if (configMatchRole == null) {
+            hasError = true;
+            errorString += " • [Match Role] can not be empty\n";
+        }
+
         RoleModel matchRole = realm.getRole(configMatchRole);
         if (matchRole == null) {
             hasError = true;
@@ -77,6 +91,10 @@ public class AdminUiPage implements UiPageProvider, UiPageProviderFactory<Compon
         UserProfileProvider profileProvider = session.getProvider(UserProfileProvider.class);
         UPConfig upconfig = profileProvider.getConfiguration();
         String configAttributeGroup = model.getConfig().getFirst("attribute-group");
+        if (configAttributeGroup == null) {
+            hasError = true;
+            errorString += " • [Attribute Group] can not be empty\n";
+        }
         if (!upconfig.getGroups().stream().anyMatch(g -> g.getName().equals(configAttributeGroup))) {
             hasError = true;
             errorString += " • [Attribute Group] does not exist\n";