diff --git a/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/Bundling/BundlingService.cs b/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/Bundling/BundlingService.cs
index 76bc82f570..3ee7cfdea3 100644
--- a/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/Bundling/BundlingService.cs
+++ b/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/Bundling/BundlingService.cs
@@ -66,7 +66,14 @@ public class BundlingService : IBundlingService, ITransientDependency
 
         var frameworkVersion = GetTargetFrameworkVersion(projectFilePath, projectType);
         var projectName = Path.GetFileNameWithoutExtension(projectFilePath);
-        var assemblyFilePath = projectType == BundlingConsts.WebAssembly? PathHelper.GetWebAssemblyFilePath(directory, frameworkVersion, projectName) : PathHelper.GetMauiBlazorAssemblyFilePath(directory, projectName);
+        var assemblyFilePath = projectType == BundlingConsts.WebAssembly
+            ? PathHelper.GetWebAssemblyFilePath(directory, frameworkVersion, projectName)
+            : PathHelper.GetMauiBlazorAssemblyFilePath(directory, projectName);
+        if (assemblyFilePath == null)
+        {
+            throw new BundlingException("No assembly file found. Please build the project first.");
+        }
+
         var startupModule = GetStartupModule(assemblyFilePath);
 
         var bundleDefinitions = new List<BundleTypeDefinition>();
diff --git a/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/Bundling/PathHelper.cs b/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/Bundling/PathHelper.cs
index 1b6b56adab..1618004bb5 100644
--- a/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/Bundling/PathHelper.cs
+++ b/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/Bundling/PathHelper.cs
@@ -1,4 +1,5 @@
-using System.IO;
+using System;
+using System.IO;
 using System.Linq;
 
 namespace Volo.Abp.Cli.Bundling;
@@ -13,12 +14,15 @@ static internal class PathHelper
     static internal string GetWebAssemblyFilePath(string directory, string frameworkVersion, string projectFileName)
     {
         var outputDirectory = Path.Combine(directory, "bin", "Debug", frameworkVersion);
-        return Path.Combine(outputDirectory, projectFileName + ".dll");
+        var path = Path.Combine(outputDirectory, projectFileName + ".dll");
+        return !File.Exists(path) ? null : path;
     }
 
     static internal string GetMauiBlazorAssemblyFilePath(string directory, string projectFileName)
     {
-        return Directory.GetFiles(directory, "*.dll", SearchOption.AllDirectories).First(f => !f.Contains("android") && f.EndsWith(projectFileName + ".dll"));
+        return Directory.GetFiles(directory, "*.dll", SearchOption.AllDirectories).FirstOrDefault(f =>
+            !f.Contains("android") &&
+            f.EndsWith(projectFileName + ".dll", StringComparison.OrdinalIgnoreCase));
     }
 
     static internal string GetWwwRootPath(string directory)