diff --git a/src/Umbraco.Web.UI.Client/src/libs/extension-api/controller/base-extension-controller.ts b/src/Umbraco.Web.UI.Client/src/libs/extension-api/controller/base-extension-controller.ts
index af5d6732a7..8be584953d 100644
--- a/src/Umbraco.Web.UI.Client/src/libs/extension-api/controller/base-extension-controller.ts
+++ b/src/Umbraco.Web.UI.Client/src/libs/extension-api/controller/base-extension-controller.ts
@@ -96,7 +96,8 @@ export abstract class UmbBaseExtensionController<
 	#gotConditions() {
 		const conditionConfigs = this.#manifest?.conditions ?? [];
 
-		if (conditionConfigs.length === 0) {
+		// As conditionConfigs might have been configured as something else than an array, then we ignorer them.
+		if (conditionConfigs.length === undefined || conditionConfigs.length === 0) {
 			this.#cleanConditions();
 			this.#onConditionsChangedCallback();
 			return;