Update: We have implemented our own solution to mitigate this issue.
There is currently an Internet-wide problem with DNS resolution happening right now. We’ve checked our upstream providers and they are functioning properly except for certain regions, which seem to be experiencing an outage that is causing assets such as images and MP3 files to be temporarily unavailable.
We have of course notified them of the issue, but as this is an Internet-wide problem and not specific to Fireside, there's nothing we can do about it except wait for them to resolve it.
We apologize for the trouble.