I've just downloaded build 2325, and cannot build for either platform. I've asked my colleague to try and build, he's on 2319 and is getting the same problem so it cannot be due to the version of Corona.
We're also in different locations, so it can't be our internet connections.
We get the following message:
ERROR: An error occurred during build. The server returned the following message: --- A device build error occurred on the server. BuildID: 53883daf98484 Error: ---
There's no feedback on what the error is, so I'm assuming that it's an issue on your end.