diff --git a/src/Umbraco.Web.UI.Client/src/packages/content/content/workspace/content-detail-workspace-base.ts b/src/Umbraco.Web.UI.Client/src/packages/content/content/workspace/content-detail-workspace-base.ts
index e31c7ab35b..43424389dd 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/content/content/workspace/content-detail-workspace-base.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/content/content/workspace/content-detail-workspace-base.ts
@@ -239,8 +239,8 @@ export abstract class UmbContentDetailWorkspaceContextBase<
 					if (missingThis) {
 						const context = new UmbValidationController(this);
 						context.inheritFrom(this.validationContext, '$');
-						context.autoReport();
 						context.setVariantId(UmbVariantId.Create(variantOption));
+						context.autoReport();
 						this.#variantValidationContexts.push(context);
 					}
 				});
diff --git a/src/Umbraco.Web.UI.Client/src/packages/core/validation/context/server-model-validator.context.ts b/src/Umbraco.Web.UI.Client/src/packages/core/validation/context/server-model-validator.context.ts
index 00e51f9052..52822cfdd2 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/core/validation/context/server-model-validator.context.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/core/validation/context/server-model-validator.context.ts
@@ -9,18 +9,7 @@ import type { UmbControllerHost } from '@umbraco-cms/backoffice/controller-api';
 import type { UmbDataSourceResponse } from '@umbraco-cms/backoffice/repository';
 import type { ClassConstructor } from '@umbraco-cms/backoffice/extension-api';
 import { UmbId } from '@umbraco-cms/backoffice/id';
-
-/** This should ideally be generated by the server, but we currently don't generate error-model-types. */
-interface ValidateErrorResponseBodyModel {
-	detail: string;
-	errors: Record<string, Array<string>>;
-	// TODO: Remove missingProperties, as we do not use it any longer: [NL]
-	missingProperties: Array<string>;
-	operationStatus: string;
-	status: number;
-	title: string;
-	type: string;
-}
+import type { UmbApiError } from '@umbraco-cms/backoffice/resources';
 
 export class UmbServerModelValidatorContext
 	extends UmbContextBase<UmbServerModelValidatorContext>
@@ -93,11 +82,11 @@ export class UmbServerModelValidatorContext
 			let messages: Array<UmbValidationMessage> = [];
 
 			// We are missing some typing here, but we will just go wild with 'as any': [NL]
-			const errorBody = (error as any).body as ValidateErrorResponseBodyModel;
+			const errorBody = (error as UmbApiError).problemDetails;
 			// Check if there are validation errors, since the error might be a generic ApiError
 			if (errorBody?.errors) {
 				Object.keys(errorBody.errors).forEach((path) => {
-					const newBodies = errorBody.errors[path];
+					const newBodies = errorBody.errors![path];
 					// Correct path to ensure it starts with `$.` (notice it mainly starts with `$.`, but the server sometimes does not include it)
 					if (path.startsWith('$.')) {
 						// Everything is good.
@@ -112,26 +101,6 @@ export class UmbServerModelValidatorContext
 					//this.#context!.messages.addMessages('server', path, errorBody.errors[path]);
 				});
 			}
-			// Check if there are missing properties:
-			if (errorBody?.missingProperties) {
-				// TODO: Remove missingProperties, as we do not use it any longer: [NL]
-				throw new Error('Missing properties are not supported.');
-				/*
-				// Retrieve the variants of he send data, as those are the once we will declare as missing properties:
-				// Temporary fix for missing properties, as we currently get one for each variant, but we do not know which variant it is for: [NL]
-				const uniqueMissingProperties = [...new Set(errorBody.missingProperties)];
-				uniqueMissingProperties.forEach((alias) => {
-					this.#data.variants.forEach((variant: any) => {
-						const path = `$.values[${UmbDataPathPropertyValueQuery({
-							alias: alias,
-							culture: variant.culture,
-							segment: variant.segment,
-						})}].value`;
-						this.#context!.messages.addMessages('server', path, [UMB_VALIDATION_EMPTY_LOCALIZATION_KEY]);
-					});
-				});
-				*/
-			}
 
 			if (messages.length > 0) {
 				const ctrl = new UmbValidationPathTranslationController(this, {
diff --git a/src/Umbraco.Web.UI.Client/src/packages/core/validation/controllers/validation.controller.test.ts b/src/Umbraco.Web.UI.Client/src/packages/core/validation/controllers/validation.controller.test.ts
index ef8542916f..fbe3dd498e 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/core/validation/controllers/validation.controller.test.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/core/validation/controllers/validation.controller.test.ts
@@ -48,7 +48,7 @@ describe('UmbValidationController', () => {
 			expect(ctrl.isValid).to.be.false;
 		});
 
-		it('is invalid when holding relevant variant messages', async () => {
+		it('is invalid when holding relevant culture and segmented variant', async () => {
 			ctrl.setVariantId(new UmbVariantId('en-us', 'mySegment'));
 			ctrl.messages.addMessage(
 				'server',
@@ -59,6 +59,28 @@ describe('UmbValidationController', () => {
 			expect(ctrl.isValid).to.be.false;
 		});
 
+		it('is invalid when holding relevant culture variant', async () => {
+			ctrl.setVariantId(new UmbVariantId('en-us', null));
+			ctrl.messages.addMessage(
+				'server',
+				"$.values[?(@.alias == 'my-property' && @.culture == 'en-us' && @.segment == null)].value",
+				'test',
+			);
+			await ctrl.validate().catch(() => undefined);
+			expect(ctrl.isValid).to.be.false;
+		});
+
+		it('is invalid when holding relevant segmented variant', async () => {
+			ctrl.setVariantId(new UmbVariantId(null, 'mySegment'));
+			ctrl.messages.addMessage(
+				'server',
+				"$.values[?(@.alias == 'my-property' && @.culture == null && @.segment == 'mySegment')].value",
+				'test',
+			);
+			await ctrl.validate().catch(() => undefined);
+			expect(ctrl.isValid).to.be.false;
+		});
+
 		it('is valid when holding irrelevant variant messages', async () => {
 			ctrl.setVariantId(new UmbVariantId('another-lang', 'mySegment'));
 			ctrl.messages.addMessage(