Upon inspecting the App Store Connect website queries, I see that the API call to appClipDomainCacheStatus returns with a 500 error code:
{
"errors": [{
"status": "500",
"code": "UNEXPECTED_ERROR",
"title": "An unexpected error occurred.",
"detail": "An unexpected error occurred on the server side. If this issue continues, contact us at https://developer.apple.com/contact/."
}]
}
It really seems like a problem on Apple’s side.