diff --git a/src/EventHub.Application/Events/EventAppService.cs b/src/EventHub.Application/Events/EventAppService.cs
index 2eb3f62..9b7ac0e 100644
--- a/src/EventHub.Application/Events/EventAppService.cs
+++ b/src/EventHub.Application/Events/EventAppService.cs
@@ -54,8 +54,10 @@ namespace EventHub.Events
 
             if (organization.OwnerUserId != CurrentUser.GetId())
             {
-                throw new BusinessException(EventHubErrorCodes.NotAuthorizedToCreateEventInThisOrganization)
-                    .WithData("OrganizationName", organization.DisplayName);
+                throw new AbpAuthorizationException(
+                    L["EventHub:NotAuthorizedToCreateEventInThisOrganization", organization.DisplayName],
+                    EventHubErrorCodes.NotAuthorizedToCreateEventInThisOrganization
+                );
             }
 
             var @event = await _eventManager.CreateAsync(
@@ -184,7 +186,7 @@ namespace EventHub.Events
             var countriesQueryable = await _countriesRepository.GetQueryableAsync();
 
             var query = from country in countriesQueryable
-                orderby country.Name ascending
+                orderby country.Name
                 select country;
 
             var countries = await AsyncExecuter.ToListAsync(query);
@@ -209,7 +211,7 @@ namespace EventHub.Events
             if (organization.OwnerUserId != CurrentUser.GetId())
             {
                 throw new AbpAuthorizationException(
-                    L["EventHub:NotAuthorizedToUpdateEvent"].Value.Replace("{EventTitle}", @event.Title),
+                    L["EventHub:NotAuthorizedToUpdateEvent", @event.Title],
                     EventHubErrorCodes.NotAuthorizedToUpdateEvent
                 );
             }
diff --git a/src/EventHub.Domain.Shared/Localization/EventHub/en.json b/src/EventHub.Domain.Shared/Localization/EventHub/en.json
index b8ff954..d986d6d 100644
--- a/src/EventHub.Domain.Shared/Localization/EventHub/en.json
+++ b/src/EventHub.Domain.Shared/Localization/EventHub/en.json
@@ -17,7 +17,7 @@
     "DisplayName:IsOnline": "Is Online?",
     "DisplayName:Capacity": "Capacity",
     "EventHub:OrganizationNameAlreadyExists": "The organization {Name} already exists. Please use another name.",
-    "EventHub:NotAuthorizedToCreateEventInThisOrganization": "You are not authorized to create events for the organization {OrganizationName}.",
+    "EventHub:NotAuthorizedToCreateEventInThisOrganization": "You are not authorized to create events for the organization {0}.",
     "EventHub:EventEndTimeCantBeEarlierThanStartTime": "Event end time can not be earlier than the start time.",
     "EventHub:CantRegisterOrUnregisterForAPastEvent": "Can not register to or unregister from an event in the past.",
     "Events": "Events",
@@ -63,7 +63,7 @@
     "LocationHasNotSpecifiedYet": "Event {0} has not been specified yet.",
     "Language": "Language",
     "EventHub:CapacityCantBeLowerThanRegisteredUserCount": "Capacity can not be lower than the currently registered user count.",
-    "EventHub:NotAuthorizedToUpdateEvent": "You are not authorized to update the \"{EventTitle}\" event.",
+    "EventHub:NotAuthorizedToUpdateEvent": "You are not authorized to update the \"{0}\" event.",
     "CoverImage": "Cover Image",
     "EventHub:CantChangeEventTiming": "Can not change the event timing more than {MaxTimingChangeLimit} times.",
     "EventCoverImageEditSuccessMessage": "The event's cover image has been changed successfully.",
diff --git a/src/EventHub.Domain/Events/Registrations/EventRegistrationManager.cs b/src/EventHub.Domain/Events/Registrations/EventRegistrationManager.cs
index e36e4fb..5552d26 100644
--- a/src/EventHub.Domain/Events/Registrations/EventRegistrationManager.cs
+++ b/src/EventHub.Domain/Events/Registrations/EventRegistrationManager.cs
@@ -4,7 +4,6 @@ using EventHub.Users;
 using Volo.Abp;
 using Volo.Abp.Domain.Repositories;
 using Volo.Abp.Domain.Services;
-using Volo.Abp.Timing;
 
 namespace EventHub.Events.Registrations
 {