If public availability 500s the frontend will error out too

[MelissaAutumn]

Sentry error: https://thunderbird.sentry.io/issues/6075640605/?project=4505428280279040&query=is%3Aunresolved%20issue.priority%3A%5Bhigh%2C%20medium%5D&referrer=issue-stream&statsPeriod=14d&stream_index=0

We should check if errorDetail is falsey and show a generic error message instead of failing to error. Although I'm not sure if that's the actual error in the frontend code. So some investigation will be required!