diff --git a/src/modules/user/application/use-cases/errors/GenerateExtensionTokensErrors.ts b/src/modules/user/application/use-cases/errors/GenerateExtensionTokensErrors.ts
index 30a6e751..9eff6435 100644
--- a/src/modules/user/application/use-cases/errors/GenerateExtensionTokensErrors.ts
+++ b/src/modules/user/application/use-cases/errors/GenerateExtensionTokensErrors.ts
@@ -1,12 +1,9 @@
-import { Result, err } from 'src/shared/core/Result';
 import { UseCaseError } from 'src/shared/core/UseCaseError';
 
 export namespace GenerateExtensionTokensErrors {
-  export class TokenGenerationError extends Result<UseCaseError> {
+  export class TokenGenerationError extends UseCaseError {
     constructor(message?: string) {
-      super(false, {
-        message: message || 'Failed to generate extension tokens',
-      } as UseCaseError);
+      super(message || 'Failed to generate extension tokens');
     }
   }
 }
diff --git a/src/modules/user/infrastructure/http/controllers/GenerateExtensionTokensController.ts b/src/modules/user/infrastructure/http/controllers/GenerateExtensionTokensController.ts
index b7d576b4..62cd1708 100644
--- a/src/modules/user/infrastructure/http/controllers/GenerateExtensionTokensController.ts
+++ b/src/modules/user/infrastructure/http/controllers/GenerateExtensionTokensController.ts
@@ -29,7 +29,10 @@ export class GenerateExtensionTokensController extends Controller {
       });
 
       if (result.isErr()) {
-        return this.fail(res, result.error.message);
+        const errorMessage = result.error instanceof Error 
+          ? result.error.message 
+          : 'Failed to generate extension tokens';
+        return this.fail(res, errorMessage);
       }
 
       // Redirect to chrome extension with tokens