Exemple : We got a lot of "An error occurred while saving the snapshot: Failed to quiesce the virtual machine [...]". I can't see which VM are in trouble. each time, I have to connect to the machine and look in the logs to get which VM is in trouble.
More details on the error currently only can be found in the logs, so it's better to send them to us for investigation via tools > diagnostic menu. You can also click "open in folder" button to check them out yourself.
As for providing more info, we're working on a big update that will introduce error codes and provide more info regarding the error messages.