diff --git a/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/StateMachine/CodeGen/Errors/HostedUIError.swift b/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/StateMachine/CodeGen/Errors/HostedUIError.swift
index d426a345f9..d8ba2e8ef1 100644
--- a/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/StateMachine/CodeGen/Errors/HostedUIError.swift
+++ b/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/StateMachine/CodeGen/Errors/HostedUIError.swift
@@ -27,6 +27,8 @@ enum HostedUIError: Error {
 
     case invalidContext
 
+    case unableToStartASWebAuthenticationSession
+
     case unknown
 }
 
diff --git a/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/StateMachine/ErrorMapping/SignInError+Helper.swift b/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/StateMachine/ErrorMapping/SignInError+Helper.swift
index 75ba411059..2a5630d898 100644
--- a/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/StateMachine/ErrorMapping/SignInError+Helper.swift
+++ b/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/StateMachine/ErrorMapping/SignInError+Helper.swift
@@ -104,6 +104,11 @@ extension HostedUIError: AuthErrorConvertible {
                 AuthPluginErrorConstants.hostedUIInvalidPresentation.errorDescription,
                 AuthPluginErrorConstants.hostedUIInvalidPresentation.recoverySuggestion)
 
+        case .unableToStartASWebAuthenticationSession:
+            return .service(
+                AuthPluginErrorConstants.hostedUIUnableToStartASWebAuthenticationSession.errorDescription,
+                AuthPluginErrorConstants.hostedUIUnableToStartASWebAuthenticationSession.recoverySuggestion)
+
         case .serviceMessage(let message):
             return .service(message, AuthPluginErrorConstants.serviceError)
 
diff --git a/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Support/Constants/AuthPluginErrorConstants.swift b/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Support/Constants/AuthPluginErrorConstants.swift
index baa46fc0d3..b6bbdfff89 100644
--- a/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Support/Constants/AuthPluginErrorConstants.swift
+++ b/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Support/Constants/AuthPluginErrorConstants.swift
@@ -40,6 +40,10 @@ enum AuthPluginErrorConstants {
         "Presentation context provided is invalid or not present",
         "Retry by providing a presentation context to present the webUI")
 
+    static let hostedUIUnableToStartASWebAuthenticationSession: AuthPluginErrorString = (
+        "Unable to start a ASWebAuthenticationSession",
+        "Make sure that the app can present an ASWebAuthenticationSession")
+
     static let hostedUISignInURI: AuthPluginErrorString = (
         "SignIn URI could not be created",
         "Check the configuration to make sure that HostedUI related information are present")
@@ -63,6 +67,7 @@ enum AuthPluginErrorConstants {
     static let userInvalidError: AuthPluginErrorString = (
         "Could not validate the user",
         "Get the current user Auth.getCurrentUser() and make the request")
+    
     static let identityIdSignOutError: AuthPluginErrorString = (
         "There is no user signed in to retreive identity id",
         "Call Auth.signIn to sign in a user or enable unauthenticated access in AWS Cognito Identity Pool")
diff --git a/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Support/HostedUI/HostedUIASWebAuthenticationSession.swift b/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Support/HostedUI/HostedUIASWebAuthenticationSession.swift
index 20f21d5262..c32f91d089 100644
--- a/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Support/HostedUI/HostedUIASWebAuthenticationSession.swift
+++ b/AmplifyPlugins/Auth/Sources/AWSCognitoAuthPlugin/Support/HostedUI/HostedUIASWebAuthenticationSession.swift
@@ -67,6 +67,8 @@ class HostedUIASWebAuthenticationSession: NSObject, HostedUISessionBehavior {
                 }
                 if canStart {
                     aswebAuthenticationSession.start()
+                } else {
+                    continuation.resume( throwing: HostedUIError.unableToStartASWebAuthenticationSession)
                 }
             }
         }
diff --git a/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/Support/HostedUIASWebAuthenticationSessionTests.swift b/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/Support/HostedUIASWebAuthenticationSessionTests.swift
index eae166c4a6..5e44e233f1 100644
--- a/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/Support/HostedUIASWebAuthenticationSessionTests.swift
+++ b/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/Support/HostedUIASWebAuthenticationSessionTests.swift
@@ -112,7 +112,21 @@ class HostedUIASWebAuthenticationSessionTests: XCTestCase {
             XCTFail("Expected HostedUIError.unknown, got \(error)")
         }
     }
-    
+
+    /// Given: A HostedUIASWebAuthenticationSession
+    /// When: showHostedUI is invoked and the session factory returns an error
+    /// Then: A HostedUIError.unableToStartASWebAuthenticationSession should be returned
+    func testShowHostedUI_withUnableToStartError_shouldReturnServiceError() async {
+        factory.mockCanStart = false
+        do {
+            _ = try await session.showHostedUI()
+        } catch let error as HostedUIError {
+            XCTAssertEqual(error, .unableToStartASWebAuthenticationSession)
+        } catch {
+            XCTFail("Expected HostedUIError.unknown, got \(error)")
+        }
+    }
+
     private func createURL(queryItems: [URLQueryItem] = []) -> URL {
         var components = URLComponents(string: "https://test.com")!
         components.queryItems = queryItems
@@ -123,6 +137,7 @@ class HostedUIASWebAuthenticationSessionTests: XCTestCase {
 class ASWebAuthenticationSessionFactory {
     var mockedURL: URL?
     var mockedError: Error?
+    var mockCanStart: Bool?
 
     func createSession(
         url URL: URL,
@@ -136,6 +151,7 @@ class ASWebAuthenticationSessionFactory {
         )
         session.mockedURL = mockedURL
         session.mockedError = mockedError
+        session.mockCanStart = mockCanStart ?? true
         return session
     }
 }
@@ -161,6 +177,11 @@ class MockASWebAuthenticationSession: ASWebAuthenticationSession {
         callback(mockedURL, mockedError)
         return presentationContextProvider?.presentationAnchor(for: self) != nil
     }
+
+    var mockCanStart = true
+    override var canStart: Bool {
+        return mockCanStart
+    }
 }
 
 extension HostedUIASWebAuthenticationSession {
diff --git a/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/TaskTests/HostedUITests/AWSAuthHostedUISignInTests.swift b/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/TaskTests/HostedUITests/AWSAuthHostedUISignInTests.swift
index 5a1a14acc1..7bb9e254bd 100644
--- a/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/TaskTests/HostedUITests/AWSAuthHostedUISignInTests.swift
+++ b/AmplifyPlugins/Auth/Tests/AWSCognitoAuthPluginUnitTests/TaskTests/HostedUITests/AWSAuthHostedUISignInTests.swift
@@ -229,6 +229,22 @@ class AWSAuthHostedUISignInTests: XCTestCase {
         await fulfillment(of: [expectation], timeout: networkTimeout)
     }
 
+    func testUnableToStartASWebAuthenticationSession() async {
+        mockHostedUIResult = .failure(.unableToStartASWebAuthenticationSession)
+        let expectation  = expectation(description: "SignIn operation should complete")
+        do {
+            _ = try await plugin.signInWithWebUI(presentationAnchor: ASPresentationAnchor(), options: nil)
+            XCTFail("Should not succeed")
+        } catch {
+            guard case AuthError.service = error else {
+                XCTFail("Should not fail with error = \(error)")
+                return
+            }
+            expectation.fulfill()
+        }
+        await fulfillment(of: [expectation], timeout: networkTimeout)
+    }
+
     @MainActor
     func testTokenParsingFailure() async {
         mockHostedUIResult = .success([