Since yesterday, all calls through the SDK fail. It always returns error 500 with text: An unknown error has occurred.

// works
const metaAdAccount: AdAccount = new AdAccount(adAccount.ad_account_id);

// fails with error 500
const accountInfo = await metaAdAccount.read(['timezone_name, currency']);

I found this issue: https://github.com/facebook/facebook-nodejs-business-sdk/issues/298