I'm seeing some

I'm seeing some errors from the WMPU core :

[04-Oct-2016 02:25:29 UTC] [WPMUDEV API Error] 4.2 | HTTP Error: 599 "" (https://premium.wpmudev.org/api/dashboard/v1/updates [599])
[04-Oct-2016 13:19:08 UTC] [WPMUDEV API Error] 4.2 | HTTP Error: 599 "" (https://premium.wpmudev.org/api/dashboard/v1/updates [599])

[05-Oct-2016 02:16:47 UTC] [WPMUDEV API Error] 4.2 | HTTP Error: 599 "" (https://premium.wpmudev.org/api/dashboard/v1/updates [599])
[05-Oct-2016 13:56:29 UTC] [WPMUDEV API Error] 4.2 | HTTP Error: 599 "" (https://premium.wpmudev.org/api/dashboard/v1/updates [599])

Not sure what's happening and its obviously not a permanent error but I thought I should bring it up.