We have identified an issue within our servers and our developers are already testing their fix. We are confident that we should have the app back working for you before the weekend. We will continue to support Classic but only to the point where our system can no longer do so (as is the case with Mac OS)
Until the app has been fixed, we can suggest:
For Classic users, your device can store up to 10 rounds of golf. Once the fix has been made you will be able to upload all of your rounds successfully.