diff --git a/modules/feature-management/src/Volo.Abp.FeatureManagement.Blazor/Components/FeatureManagementModal.razor.cs b/modules/feature-management/src/Volo.Abp.FeatureManagement.Blazor/Components/FeatureManagementModal.razor.cs
index ea07a96b46..ada5853f6a 100644
--- a/modules/feature-management/src/Volo.Abp.FeatureManagement.Blazor/Components/FeatureManagementModal.razor.cs
+++ b/modules/feature-management/src/Volo.Abp.FeatureManagement.Blazor/Components/FeatureManagementModal.razor.cs
@@ -16,26 +16,26 @@ namespace Volo.Abp.FeatureManagement.Blazor.Components
     public partial class FeatureManagementModal
     {
         [Inject] protected IFeatureAppService FeatureAppService { get; set; }
-        
+
         [Inject] protected IUiMessageService UiMessageService { get; set; }
-        
+
         [Inject] protected IStringLocalizerFactory HtmlLocalizerFactory { get; set; }
-        
+
         [Inject] protected IOptions<AbpLocalizationOptions> LocalizationOptions { get; set; }
 
         protected Modal Modal;
-        
+
         protected string ProviderName;
         protected string ProviderKey;
 
         protected string SelectedTabName;
-        
+
         protected List<FeatureGroupDto> Groups { get; set; }
 
         protected Dictionary<string, bool> ToggleValues;
 
         protected Dictionary<string, string> SelectionStringValues;
-        
+
         public virtual async Task OpenAsync([NotNull]string providerName, string providerKey = null)
         {
             ProviderName = providerName;
@@ -43,11 +43,11 @@ namespace Volo.Abp.FeatureManagement.Blazor.Components
 
             ToggleValues = new Dictionary<string, bool>();
             SelectionStringValues = new Dictionary<string, string>();
-            
+
             Groups = (await FeatureAppService.GetAsync(ProviderName, ProviderKey)).Groups;
 
             SelectedTabName = GetNormalizedGroupName(Groups.First().Name);
-            
+
             foreach (var featureGroupDto in Groups)
             {
                 foreach (var featureDto in featureGroupDto.Features)
@@ -66,13 +66,13 @@ namespace Volo.Abp.FeatureManagement.Blazor.Components
 
             Modal.Show();
         }
-        
+
         public virtual Task CloseModal()
         {
             Modal.Hide();
             return Task.CompletedTask;
         }
-        
+
         protected virtual async Task SaveAsync()
         {
             var features = new UpdateFeaturesDto
@@ -80,21 +80,21 @@ namespace Volo.Abp.FeatureManagement.Blazor.Components
                 Features = Groups.SelectMany(g => g.Features).Select(f => new UpdateFeatureDto
                 {
                     Name = f.Name,
-                    Value = f.ValueType is ToggleStringValueType ? ToggleValues[f.Name].ToString() : 
+                    Value = f.ValueType is ToggleStringValueType ? ToggleValues[f.Name].ToString() :
                             f.ValueType is SelectionStringValueType ? SelectionStringValues[f.Name] : f.Value
                 }).ToList()
             };
-            
+
             await FeatureAppService.UpdateAsync(ProviderName, ProviderKey, features);
-            
+
             Modal.Hide();
         }
-        
+
         protected virtual string GetNormalizedGroupName(string name)
         {
             return "FeatureGroup_" + name.Replace(".", "_");
         }
-        
+
         protected virtual bool IsDisabled(string providerName)
         {
             return providerName != ProviderName && providerName != DefaultValueFeatureValueProvider.ProviderName;
@@ -102,7 +102,7 @@ namespace Volo.Abp.FeatureManagement.Blazor.Components
 
         protected virtual async Task OnFeatureValueChangedAsync(string value, FeatureDto feature)
         {
-            if (feature.ValueType.Validator.IsValid(value))
+            if (feature?.ValueType?.Validator.IsValid(value) == true)
             {
                 feature.Value = value;
             }
@@ -116,11 +116,11 @@ namespace Volo.Abp.FeatureManagement.Blazor.Components
         {
             SelectionStringValues[featureName] = value;
         }
-        
+
         protected virtual IStringLocalizer CreateStringLocalizer(string resourceName)
         {
             var resource = LocalizationOptions.Value.Resources.Values.FirstOrDefault(x => x.ResourceName == resourceName);
             return HtmlLocalizerFactory.Create(resource != null ? resource.ResourceType : LocalizationOptions.Value.DefaultResourceType);
         }
     }
-}
\ No newline at end of file
+}