not recovering from error after converting Effect to Either

      /**
       * Retrieves a parameter from SSM Parameter Store with optional decryption.
       */
      const getParameter = (
        Name: string,
        WithDecryption: boolean = false,
      ) =>
        Effect.gen(function* () {
          const ssmClient = new SSMClient({ region });
          const command = new GetParameterCommand({
            Name,
            WithDecryption,
          });
          const parameter$ = yield* Effect.tryPromise({
            try: async () => {
              const response = await ssmClient.send(command);
              return response.Parameter?.Value;
            },
            catch: (e) =>
              new SSMClientError(`Failed to fetch Parameter ${Name}`, {
                cause: e,
              }),
          });
          return parameter$;
        }).pipe(Effect.either);  // eff_1

/**
 * Fetches the manifest ID from the SSMClientService.
 */
const getManifestId = Effect.gen(function* () {
  const { getParameter } = yield* SSMClientService;
  const { manifestIdSSMName } = yield* ArchiveConfigService;
  const manifestId$ = yield* getParameter(manifestIdSSMName);
  return manifestId$;
}).pipe(Effect.either);//eff_2

...
const program = Effect.gen(function* () {
...
 const manifestId$ = yield* getManifestId;
  yield* Effect.logInfo("Manifest ID obtained:", yield* manifestId$).pipe(
    Effect.when(() => Either.isRight(manifestId$)),
  );

}