diff --git a/src/Umbraco.Web.UI.Client/src/packages/block/block-list/components/block-list-entry/block-list-entry.element.ts b/src/Umbraco.Web.UI.Client/src/packages/block/block-list/components/block-list-entry/block-list-entry.element.ts
index 4d8764fec6..6079200551 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/block/block-list/components/block-list-entry/block-list-entry.element.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/block/block-list/components/block-list-entry/block-list-entry.element.ts
@@ -10,6 +10,8 @@ import '../inline-list-block/index.js';
 import { stringOrStringArrayContains } from '@umbraco-cms/backoffice/utils';
 import { UmbBlockListEntryContext } from '../../context/block-list-entry.context.js';
 import { UMB_BLOCK_LIST, type UmbBlockListLayoutModel } from '../../types.js';
+import { UmbObserveValidationStateController } from '@umbraco-cms/backoffice/validation';
+import { UmbDataPathBlockElementDataFilter } from '@umbraco-cms/backoffice/block';
 
 /**
  * @element umb-block-list-entry
@@ -33,6 +35,16 @@ export class UmbBlockListEntryElement extends UmbLitElement implements UmbProper
 		if (!value) return;
 		this._contentUdi = value;
 		this.#context.setContentUdi(value);
+
+		new UmbObserveValidationStateController(
+			this,
+			`$.contentData[${UmbDataPathBlockElementDataFilter({ udi: value })}]`,
+			(hasMessages) => {
+				this._contentInvalid = hasMessages;
+				this._blockViewProps.contentInvalid = hasMessages;
+			},
+			'observeMessagesForContent',
+		);
 	}
 	private _contentUdi?: string | undefined;
 
@@ -61,6 +73,14 @@ export class UmbBlockListEntryElement extends UmbLitElement implements UmbProper
 	@state()
 	_inlineEditingMode?: boolean;
 
+	// 'content-invalid' attribute is used for styling purpose.
+	@property({ type: Boolean, attribute: 'content-invalid', reflect: true })
+	_contentInvalid?: boolean;
+
+	// 'settings-invalid' attribute is used for styling purpose.
+	@property({ type: Boolean, attribute: 'settings-invalid', reflect: true })
+	_settingsInvalid?: boolean;
+
 	@state()
 	_blockViewProps: UmbBlockEditorCustomViewProperties<UmbBlockListLayoutModel> = {
 		contentUdi: undefined!,
@@ -141,6 +161,20 @@ export class UmbBlockListEntryElement extends UmbLitElement implements UmbProper
 			this.#context.settings,
 			(settings) => {
 				this.#updateBlockViewProps({ settings });
+
+				this.removeUmbControllerByAlias('observeMessagesForSettings');
+				if (settings) {
+					// Observe settings validation state:
+					new UmbObserveValidationStateController(
+						this,
+						`$.settingsData[${UmbDataPathBlockElementDataFilter(settings)}]`,
+						(hasMessages) => {
+							this._settingsInvalid = hasMessages;
+							this._blockViewProps.settingsInvalid = hasMessages;
+						},
+						'observeMessagesForSettings',
+					);
+				}
 			},
 			null,
 		);
@@ -218,16 +252,26 @@ export class UmbBlockListEntryElement extends UmbLitElement implements UmbProper
 			>
 			<uui-action-bar>
 				${this._showContentEdit && this._workspaceEditContentPath
-					? html`<uui-button label="edit" compact href=${this._workspaceEditContentPath}>
+					? html`<uui-button label="edit" look="secondary" href=${this._workspaceEditContentPath}>
 							<uui-icon name="icon-edit"></uui-icon>
+							${this._contentInvalid
+								? html`<uui-badge attention color="danger" label="Invalid settings">!</uui-badge>`
+								: ''}
 						</uui-button>`
 					: ''}
 				${this._hasSettings && this._workspaceEditSettingsPath
-					? html`<uui-button label="Edit settings" compact href=${this._workspaceEditSettingsPath}>
+					? html`<uui-button
+							label="Edit settings"
+							look="secondary"
+							color=${this._settingsInvalid ? 'danger' : ''}
+							href=${this._workspaceEditSettingsPath}>
 							<uui-icon name="icon-settings"></uui-icon>
+							${this._settingsInvalid
+								? html`<uui-badge attention color="danger" label="Invalid settings">!</uui-badge>`
+								: ''}
 						</uui-button>`
 					: ''}
-				<uui-button label="delete" compact @click=${() => this.#context.requestDelete()}>
+				<uui-button label="delete" look="secondary" @click=${() => this.#context.requestDelete()}>
 					<uui-icon name="icon-remove"></uui-icon>
 				</uui-button>
 			</uui-action-bar>
@@ -248,11 +292,33 @@ export class UmbBlockListEntryElement extends UmbLitElement implements UmbProper
 				position: absolute;
 				top: var(--uui-size-2);
 				right: var(--uui-size-2);
+				opacity: 0;
+				transition: opacity 120ms;
+			}
+			:host(:hover) uui-action-bar,
+			uui-action-bar:focus,
+			:host(:focus-within) uui-action-bar {
+				opacity: 1;
 			}
 
 			:host([drag-placeholder]) {
 				opacity: 0.2;
 			}
+
+			:host([settings-invalid])::before,
+			:host([content-invalid])::before {
+				content: '';
+				position: absolute;
+				inset: 0;
+				z-index: 1;
+				pointer-events: none;
+				border: 1px solid var(--uui-color-danger);
+				border-radius: var(--uui-border-radius);
+			}
+
+			uui-badge {
+				z-index: 2;
+			}
 		`,
 	];
 }
diff --git a/src/Umbraco.Web.UI.Client/src/packages/block/block-list/property-editors/block-list-editor/property-editor-ui-block-list.element.ts b/src/Umbraco.Web.UI.Client/src/packages/block/block-list/property-editors/block-list-editor/property-editor-ui-block-list.element.ts
index def96de8f3..61a09cea95 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/block/block-list/property-editors/block-list-editor/property-editor-ui-block-list.element.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/block/block-list/property-editors/block-list-editor/property-editor-ui-block-list.element.ts
@@ -51,6 +51,7 @@ export class UmbPropertyEditorUIBlockListElement extends UmbLitElement implement
 
 	#validationContext = new UmbValidationContext(this).provide();
 	#contentDataPathTranslator?: UmbBlockElementDataValidationPathTranslator;
+	#settingsDataPathTranslator?: UmbBlockElementDataValidationPathTranslator;
 
 	//#catalogueModal: UmbModalRouteRegistrationController<typeof UMB_BLOCK_CATALOGUE_MODAL.DATA, undefined>;
 
@@ -133,9 +134,7 @@ export class UmbPropertyEditorUIBlockListElement extends UmbLitElement implement
 			this.observe(
 				context.dataPath,
 				(dataPath) => {
-					//
-					// TODO: Make translator for settings.
-
+					// Translate paths for content elements:
 					this.#contentDataPathTranslator?.destroy();
 					if (dataPath) {
 						// Set the data path for the local validation context:
@@ -143,6 +142,15 @@ export class UmbPropertyEditorUIBlockListElement extends UmbLitElement implement
 
 						this.#contentDataPathTranslator = new UmbBlockElementDataValidationPathTranslator(this, 'contentData');
 					}
+
+					// Translate paths for settings elements:
+					this.#settingsDataPathTranslator?.destroy();
+					if (dataPath) {
+						// Set the data path for the local validation context:
+						this.#validationContext.setDataPath(dataPath);
+
+						this.#settingsDataPathTranslator = new UmbBlockElementDataValidationPathTranslator(this, 'settingsData');
+					}
 				},
 				'observeDataPath',
 			);
diff --git a/src/Umbraco.Web.UI.Client/src/packages/core/extension-registry/interfaces/block-editor-custom-view-element.interface.ts b/src/Umbraco.Web.UI.Client/src/packages/core/extension-registry/interfaces/block-editor-custom-view-element.interface.ts
index d9b7a73de0..35ed551b97 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/core/extension-registry/interfaces/block-editor-custom-view-element.interface.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/core/extension-registry/interfaces/block-editor-custom-view-element.interface.ts
@@ -46,6 +46,8 @@ export interface UmbBlockEditorCustomViewProperties<
 	layout?: LayoutType;
 	content?: UmbBlockDataType;
 	settings?: UmbBlockDataType;
+	contentInvalid?: boolean;
+	settingsInvalid?: boolean;
 }
 
 export interface UmbBlockEditorCustomViewElement<
diff --git a/src/Umbraco.Web.UI.Client/src/packages/core/validation/context/validation.context.ts b/src/Umbraco.Web.UI.Client/src/packages/core/validation/context/validation.context.ts
index cbf4266b63..73d6fb95d8 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/core/validation/context/validation.context.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/core/validation/context/validation.context.ts
@@ -276,6 +276,7 @@ export class UmbValidationContext extends UmbControllerBase implements UmbValida
 	}
 
 	override destroy(): void {
+		this.#providerCtrl = undefined;
 		if (this.#parent) {
 			this.#parent.removeValidator(this);
 		}