diff --git a/src/lib/types.ts b/src/lib/types.ts
index e4084fa..c83e441 100644
--- a/src/lib/types.ts
+++ b/src/lib/types.ts
@@ -324,6 +324,17 @@ export interface UserSettings {
  * Extracts the .value property from each TranslatedField.
  */
 export function transformApiSettings(apiSettings: ApiUserSettingsResponse): UserSettings {
+  // Validate that all required fields with TranslatedField wrappers are present
+  if (!apiSettings.onboarding?.value) {
+    throw new Error('API settings missing required field: onboarding.value. Received: ' + JSON.stringify(apiSettings));
+  }
+  if (!apiSettings.default_remote_sport) {
+    throw new Error('API settings missing required field: default_remote_sport. Received: ' + JSON.stringify(apiSettings));
+  }
+  if (!apiSettings.default_remote_member_id) {
+    throw new Error('API settings missing required field: default_remote_member_id. Received: ' + JSON.stringify(apiSettings));
+  }
+
   return {
     onboarding: apiSettings.onboarding.value,
     default_remote_sport: apiSettings.default_remote_sport.value,