Guard against errors in case of unlisted or renamed chosen search

app/dawn-hub/Views/OnboardingViews/Step3_ChooseDefaultSearchView/ChooseDefaultSearchConstants.js

@@ -12,6 +12,7 @@
  */
 
 export const SET_DEFAULT_SEARCH = 'SET_DEFAULT_SEARCH';
+export const DAWN_SETUP_NUMBER_FOR_UNLISTED_OR_RENAMED_SEARCH = 0;
 export const SEARCH_GHOSTERY = 'Ghostery';
 export const SEARCH_BING = 'Bing';
 export const SEARCH_YAHOO = 'Yahoo';
@@ -27,3 +28,4 @@ export const SEARCH_QWANT = 'Qwant';
 export const SEARCH_ENCRYPT = 'TODO: Add Search Encrypt browser.search.get() string';
 export const SEARCH_TAILCAT = 'Tailcat';
 export const SEARCH_OTHER = t('ghostery_dawn_onboarding_other');
+

app/dawn-hub/Views/OnboardingViews/Step3_ChooseDefaultSearchView/ChooseDefaultSearchView.jsx

@@ -32,7 +32,8 @@ import {
 	SEARCH_QWANT,
 	SEARCH_ENCRYPT,
 	SEARCH_TAILCAT,
-	SEARCH_OTHER
+	SEARCH_OTHER,
+	DAWN_SETUP_NUMBER_FOR_UNLISTED_OR_RENAMED_SEARCH
 } from './ChooseDefaultSearchConstants';
 import { Modal } from '../../../../shared-components';
 
@@ -161,9 +162,14 @@ class ChooseDefaultSearchView extends Component {
 
 		setDefaultSearch(chosenSearchName);
 
+		const chosenSearchNameIndex = searchSetupNumbers.indexOf(chosenSearchName);
+		const dawn_setup_number = (chosenSearchNameIndex === -1)
+			? DAWN_SETUP_NUMBER_FOR_UNLISTED_OR_RENAMED_SEARCH
+			: searchSetupNumbers[chosenSearchNameIndex].dawn_setup_number;
+
 		setSetupStep({
 			setup_step: CHOOSE_DEFAULT_SEARCH,
-			dawn_setup_number: searchSetupNumbers.find(elem => elem.name === chosenSearchName).dawn_setup_number,
+			dawn_setup_number,
 			origin: ONBOARDING
 		});
 		history.push(`/${ONBOARDING}/${CHOOSE_PLAN}`);