regression: validate that the login error value is actually a string (#5602)

Author: dnlsilva

app/views/LoginView/handleLoginErrors.ts

@@ -26,10 +26,12 @@ const LOGIN_SUBMIT_ERRORS = {
 };
 
 export const handleLoginErrors = (error: keyof typeof LOGIN_SUBMIT_ERRORS): string => {
-	const errorKey = Object.keys(LOGIN_SUBMIT_ERRORS).find(key => error.includes(key)) as keyof typeof LOGIN_SUBMIT_ERRORS;
-	const e = errorKey ? LOGIN_SUBMIT_ERRORS[errorKey].i18n : 'Login_error';
-	if (i18n.isTranslated(e)) {
-		return i18n.t(e);
+	if (typeof error === 'string') {
+		const errorKey = Object.keys(LOGIN_SUBMIT_ERRORS).find(key => error?.includes(key)) as keyof typeof LOGIN_SUBMIT_ERRORS;
+		const e = errorKey ? LOGIN_SUBMIT_ERRORS[errorKey]?.i18n : 'Login_error';
+		if (i18n.isTranslated(e)) {
+			return i18n.t(e);
+		}
 	}
 	return i18n.t('Login_error');
 };