diff --git a/src/Umbraco.Web.UI.Client/src/packages/core/notification/index.ts b/src/Umbraco.Web.UI.Client/src/packages/core/notification/index.ts
index 526e0028f401..40980d113511 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/core/notification/index.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/core/notification/index.ts
@@ -1,7 +1,5 @@
 import './layouts/default/index.js';
 export * from './controllers/peek-error/index.js';
-export * from '../resources/extractUmbNotificationColor.function.js';
-export * from './isUmbNotifications.function.js';
 export * from './notification-handler.js';
 export * from './notification.context.js';
 
diff --git a/src/Umbraco.Web.UI.Client/src/packages/core/notification/isUmbNotifications.function.ts b/src/Umbraco.Web.UI.Client/src/packages/core/notification/isUmbNotifications.function.ts
deleted file mode 100644
index ab861df6c2e4..000000000000
--- a/src/Umbraco.Web.UI.Client/src/packages/core/notification/isUmbNotifications.function.ts
+++ /dev/null
@@ -1,38 +0,0 @@
-import { EventMessageTypeModel } from '@umbraco-cms/backoffice/external/backend-api';
-
-/**
- * @deprecated Import from `@umbraco-cms/backoffice/resources` instead.
- */
-function objectIsUmbNotification(notification: unknown): notification is UmbNotificationsEventModel {
-	if (typeof notification !== 'object' || notification === null) {
-		return false;
-	}
-	const object = notification as UmbNotificationsEventModel;
-	return (
-		typeof object.category === 'string' &&
-		typeof object.message === 'string' &&
-		typeof object.type === 'string' &&
-		Object.values(EventMessageTypeModel).includes(object.type)
-	);
-}
-
-/**
- * @deprecated Import from `@umbraco-cms/backoffice/resources` instead.
- */
-export interface UmbNotificationsEventModel {
-	category: string;
-	message: string;
-	type: EventMessageTypeModel;
-}
-
-/**
- * @deprecated Import from `@umbraco-cms/backoffice/resources` instead.
- */
-export function isUmbNotifications(notifications: Array<unknown>): notifications is Array<UmbNotificationsEventModel> {
-	return notifications.every(objectIsUmbNotification);
-}
-
-/**
- * @deprecated Import from `@umbraco-cms/backoffice/resources` instead.
- */
-export const UMB_NOTIFICATION_HEADER = 'umb-notifications';
diff --git a/src/Umbraco.Web.UI.Client/src/packages/core/resources/api-interceptor.controller.ts b/src/Umbraco.Web.UI.Client/src/packages/core/resources/api-interceptor.controller.ts
index aa54c5f841df..b4043cd5ea16 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/core/resources/api-interceptor.controller.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/core/resources/api-interceptor.controller.ts
@@ -45,34 +45,40 @@ export class UmbApiInterceptorController extends UmbControllerBase {
 		client.interceptors.response.use(async (response) => {
 			if (response.ok) return response;
 
-			// Clones the response to read the body
-			const origResponse = response.clone();
-			const error = await origResponse.json();
-			if (!error) return response;
-
-			// If the error is not an UmbError, we check if it is a problem details object
-			// Check if the error is a problem details object
-			if (!('type' in error) || !('title' in error) || !('status' in error)) {
-				// If not, we just return the response
-				return response;
-			}
-
 			// Handle 500 errors - we need to show a notification
-			if (origResponse.status === 500) {
-				let headline = error.title ?? error.name ?? 'Server Error';
-				let message = 'A fatal server error occurred. If this continues, please reach out to your administrator.';
-
-				// Special handling for ObjectCacheAppCache corruption errors, which we are investigating
-				if (
-					error.detail?.includes('ObjectCacheAppCache') ||
-					error.detail?.includes('Umbraco.Cms.Infrastructure.Scoping.Scope.DisposeLastScope()')
-				) {
-					headline = 'Please restart the server';
-					message =
-						'The Umbraco object cache is corrupt, but your action may still have been executed. Please restart the server to reset the cache. This is a work in progress.';
-				}
+			if (response.status === 500) {
+				try {
+					// Clones the response to read the body
+					const origResponse = response.clone();
+					const error = await origResponse.json();
+
+					if (!error) return response;
 
-				this.#peekError(headline, message, error.errors ?? error.detail);
+					// If the error is not an UmbError, we check if it is a problem details object
+					// Check if the error is a problem details object
+					if (!('type' in error) || !('title' in error) || !('status' in error)) {
+						// If not, we just return the response
+						return response;
+					}
+
+					let headline = error.title ?? error.name ?? 'Server Error';
+					let message = 'A fatal server error occurred. If this continues, please reach out to your administrator.';
+
+					// Special handling for ObjectCacheAppCache corruption errors, which we are investigating
+					if (
+						error.detail?.includes('ObjectCacheAppCache') ||
+						error.detail?.includes('Umbraco.Cms.Infrastructure.Scoping.Scope.DisposeLastScope()')
+					) {
+						headline = 'Please restart the server';
+						message =
+							'The Umbraco object cache is corrupt, but your action may still have been executed. Please restart the server to reset the cache. This is a work in progress.';
+					}
+
+					this.#peekError(headline, message, error.errors ?? error.detail);
+				} catch (e) {
+					// Ignore JSON parse error
+					console.error('[Interceptor] Caught a 500 Error, but failed parsing error body (expected JSON)', e);
+				}
 			}
 
 			// Return original response