diff --git a/apps/browser/src/_locales/en/messages.json b/apps/browser/src/_locales/en/messages.json
index 63075053e3..bf29ff2fd2 100644
--- a/apps/browser/src/_locales/en/messages.json
+++ b/apps/browser/src/_locales/en/messages.json
@@ -3045,6 +3045,9 @@
       }
     }
   },
+  "duoHealthCheckResultsInNullAuthUrlError": {
+    "message": "Error connecting with the Duo service. Use a different two-step login method or contact Duo for assistance."
+  },
   "launchDuoAndFollowStepsToFinishLoggingIn": {
     "message": "Launch Duo and follow the steps to finish logging in."
   },
diff --git a/apps/browser/src/auth/popup/two-factor.component.ts b/apps/browser/src/auth/popup/two-factor.component.ts
index 98363bc93c..f3c44ca9ca 100644
--- a/apps/browser/src/auth/popup/two-factor.component.ts
+++ b/apps/browser/src/auth/popup/two-factor.component.ts
@@ -25,7 +25,7 @@ import { MessagingService } from "@bitwarden/common/platform/abstractions/messag
 import { PlatformUtilsService } from "@bitwarden/common/platform/abstractions/platform-utils.service";
 import { StateService } from "@bitwarden/common/platform/abstractions/state.service";
 import { SyncService } from "@bitwarden/common/vault/abstractions/sync/sync.service.abstraction";
-import { DialogService } from "@bitwarden/components";
+import { DialogService, ToastService } from "@bitwarden/components";
 
 import { BrowserApi } from "../../platform/browser/browser-api";
 import { ZonedMessageListenerService } from "../../platform/browser/zoned-message-listener.service";
@@ -62,6 +62,7 @@ export class TwoFactorComponent extends BaseTwoFactorComponent {
     private dialogService: DialogService,
     masterPasswordService: InternalMasterPasswordServiceAbstraction,
     accountService: AccountService,
+    toastService: ToastService,
     @Inject(WINDOW) protected win: Window,
     private browserMessagingApi: ZonedMessageListenerService,
   ) {
@@ -84,6 +85,7 @@ export class TwoFactorComponent extends BaseTwoFactorComponent {
       configService,
       masterPasswordService,
       accountService,
+      toastService,
     );
     super.onSuccessfulLogin = async () => {
       // FIXME: Verify that this floating promise is intentional. If it is, add an explanatory comment and ensure there is proper error handling.
@@ -226,6 +228,15 @@ export class TwoFactorComponent extends BaseTwoFactorComponent {
   }
 
   override async launchDuoFrameless() {
+    if (this.duoFramelessUrl === null) {
+      this.toastService.showToast({
+        variant: "error",
+        title: null,
+        message: this.i18nService.t("duoHealthCheckResultsInNullAuthUrlError"),
+      });
+      return;
+    }
+
     const duoHandOffMessage = {
       title: this.i18nService.t("youSuccessfullyLoggedIn"),
       message: this.i18nService.t("youMayCloseThisWindow"),
diff --git a/apps/desktop/src/auth/two-factor.component.ts b/apps/desktop/src/auth/two-factor.component.ts
index d1b84c1fa0..3f5e8aee19 100644
--- a/apps/desktop/src/auth/two-factor.component.ts
+++ b/apps/desktop/src/auth/two-factor.component.ts
@@ -25,6 +25,7 @@ import { LogService } from "@bitwarden/common/platform/abstractions/log.service"
 import { PlatformUtilsService } from "@bitwarden/common/platform/abstractions/platform-utils.service";
 import { StateService } from "@bitwarden/common/platform/abstractions/state.service";
 import { SyncService } from "@bitwarden/common/vault/abstractions/sync/sync.service.abstraction";
+import { ToastService } from "@bitwarden/components";
 
 import { TwoFactorOptionsComponent } from "./two-factor-options.component";
 
@@ -64,6 +65,7 @@ export class TwoFactorComponent extends BaseTwoFactorComponent {
     configService: ConfigService,
     masterPasswordService: InternalMasterPasswordServiceAbstraction,
     accountService: AccountService,
+    toastService: ToastService,
     @Inject(WINDOW) protected win: Window,
   ) {
     super(
@@ -85,6 +87,7 @@ export class TwoFactorComponent extends BaseTwoFactorComponent {
       configService,
       masterPasswordService,
       accountService,
+      toastService,
     );
     super.onSuccessfulLogin = async () => {
       // FIXME: Verify that this floating promise is intentional. If it is, add an explanatory comment and ensure there is proper error handling.
@@ -149,6 +152,15 @@ export class TwoFactorComponent extends BaseTwoFactorComponent {
   }
 
   override async launchDuoFrameless() {
+    if (this.duoFramelessUrl === null) {
+      this.toastService.showToast({
+        variant: "error",
+        title: null,
+        message: this.i18nService.t("duoHealthCheckResultsInNullAuthUrlError"),
+      });
+      return;
+    }
+
     const duoHandOffMessage = {
       title: this.i18nService.t("youSuccessfullyLoggedIn"),
       message: this.i18nService.t("youMayCloseThisWindow"),
diff --git a/apps/desktop/src/locales/en/messages.json b/apps/desktop/src/locales/en/messages.json
index 5154339482..72d17baa14 100644
--- a/apps/desktop/src/locales/en/messages.json
+++ b/apps/desktop/src/locales/en/messages.json
@@ -2778,6 +2778,9 @@
       }
     }
   },
+  "duoHealthCheckResultsInNullAuthUrlError": {
+    "message": "Error connecting with the Duo service. Use a different two-step login method or contact Duo for assistance."
+  },
   "launchDuoAndFollowStepsToFinishLoggingIn": {
     "message": "Launch Duo and follow the steps to finish logging in."
   },
diff --git a/apps/web/src/app/auth/two-factor.component.ts b/apps/web/src/app/auth/two-factor.component.ts
index b3241a9242..528ce6fda3 100644
--- a/apps/web/src/app/auth/two-factor.component.ts
+++ b/apps/web/src/app/auth/two-factor.component.ts
@@ -23,7 +23,7 @@ import { I18nService } from "@bitwarden/common/platform/abstractions/i18n.servic
 import { LogService } from "@bitwarden/common/platform/abstractions/log.service";
 import { PlatformUtilsService } from "@bitwarden/common/platform/abstractions/platform-utils.service";
 import { StateService } from "@bitwarden/common/platform/abstractions/state.service";
-import { DialogService } from "@bitwarden/components";
+import { DialogService, ToastService } from "@bitwarden/components";
 
 import {
   TwoFactorOptionsDialogResult,
@@ -69,6 +69,7 @@ export class TwoFactorComponent extends BaseTwoFactorComponent implements OnDest
     configService: ConfigService,
     masterPasswordService: InternalMasterPasswordServiceAbstraction,
     accountService: AccountService,
+    toastService: ToastService,
     private formBuilder: FormBuilder,
     @Inject(WINDOW) protected win: Window,
   ) {
@@ -91,6 +92,7 @@ export class TwoFactorComponent extends BaseTwoFactorComponent implements OnDest
       configService,
       masterPasswordService,
       accountService,
+      toastService,
     );
     this.onSuccessfulLoginNavigate = this.goAfterLogIn;
   }
diff --git a/apps/web/src/locales/en/messages.json b/apps/web/src/locales/en/messages.json
index 0f9e334fea..b99f065746 100644
--- a/apps/web/src/locales/en/messages.json
+++ b/apps/web/src/locales/en/messages.json
@@ -6210,6 +6210,9 @@
       }
     }
   },
+  "duoHealthCheckResultsInNullAuthUrlError": {
+    "message": "Error connecting with the Duo service. Use a different two-step login method or contact Duo for assistance."
+  },
   "launchDuoAndFollowStepsToFinishLoggingIn": {
     "message": "Launch Duo and follow the steps to finish logging in."
   },
diff --git a/libs/angular/src/auth/components/two-factor.component.spec.ts b/libs/angular/src/auth/components/two-factor.component.spec.ts
index 0eb248f6d9..3325f3bc32 100644
--- a/libs/angular/src/auth/components/two-factor.component.spec.ts
+++ b/libs/angular/src/auth/components/two-factor.component.spec.ts
@@ -32,6 +32,7 @@ import { PlatformUtilsService } from "@bitwarden/common/platform/abstractions/pl
 import { StateService } from "@bitwarden/common/platform/abstractions/state.service";
 import { FakeAccountService, mockAccountServiceWith } from "@bitwarden/common/spec";
 import { UserId } from "@bitwarden/common/types/guid";
+import { ToastService } from "@bitwarden/components";
 
 import { TwoFactorComponent } from "./two-factor.component";
 
@@ -71,6 +72,7 @@ describe("TwoFactorComponent", () => {
   let mockConfigService: MockProxy<ConfigService>;
   let mockMasterPasswordService: FakeMasterPasswordService;
   let mockAccountService: FakeAccountService;
+  let mockToastService: MockProxy<ToastService>;
 
   let mockUserDecryptionOpts: {
     noMasterPassword: UserDecryptionOptions;
@@ -102,6 +104,7 @@ describe("TwoFactorComponent", () => {
     mockSsoLoginService = mock<SsoLoginServiceAbstraction>();
     mockConfigService = mock<ConfigService>();
     mockAccountService = mockAccountServiceWith(userId);
+    mockToastService = mock<ToastService>();
     mockMasterPasswordService = new FakeMasterPasswordService();
 
     mockUserDecryptionOpts = {
@@ -182,6 +185,7 @@ describe("TwoFactorComponent", () => {
         { provide: ConfigService, useValue: mockConfigService },
         { provide: InternalMasterPasswordServiceAbstraction, useValue: mockMasterPasswordService },
         { provide: AccountService, useValue: mockAccountService },
+        { provide: ToastService, useValue: mockToastService },
       ],
     });
 
diff --git a/libs/angular/src/auth/components/two-factor.component.ts b/libs/angular/src/auth/components/two-factor.component.ts
index d08e9a0a2e..8c849db6c6 100644
--- a/libs/angular/src/auth/components/two-factor.component.ts
+++ b/libs/angular/src/auth/components/two-factor.component.ts
@@ -32,6 +32,7 @@ import { I18nService } from "@bitwarden/common/platform/abstractions/i18n.servic
 import { LogService } from "@bitwarden/common/platform/abstractions/log.service";
 import { PlatformUtilsService } from "@bitwarden/common/platform/abstractions/platform-utils.service";
 import { StateService } from "@bitwarden/common/platform/abstractions/state.service";
+import { ToastService } from "@bitwarden/components";
 
 import { CaptchaProtectedComponent } from "./captcha-protected.component";
 
@@ -94,6 +95,7 @@ export class TwoFactorComponent extends CaptchaProtectedComponent implements OnI
     protected configService: ConfigService,
     protected masterPasswordService: InternalMasterPasswordServiceAbstraction,
     protected accountService: AccountService,
+    protected toastService: ToastService,
   ) {
     super(environmentService, i18nService, platformUtilsService);
     this.webAuthnSupported = this.platformUtilsService.supportsWebAuthn(win);
@@ -474,6 +476,15 @@ export class TwoFactorComponent extends CaptchaProtectedComponent implements OnI
   }
 
   async launchDuoFrameless() {
+    if (this.duoFramelessUrl === null) {
+      this.toastService.showToast({
+        variant: "error",
+        title: null,
+        message: this.i18nService.t("duoHealthCheckResultsInNullAuthUrlError"),
+      });
+      return;
+    }
+
     this.platformUtilsService.launchUri(this.duoFramelessUrl);
   }
 }