Bintray Repository seems to be down

I tried updating openhab last weekend, but it failed with:
“E: The repository ‘ stable Release’ does no longer have a Release file.”

So I thought maybe the repo is being updated.
I tried again just now and still get the same error.
When I browse to the URL I only see empty folders. browsing will show the proper repository structure.
There seems to be a problem with the repository synchronisation.