I ran into this problem today. I tried to delete a configuration file using the delete config button on the node details page/tab for a device and ended up with an error.
Cirrus.ConfigArchive.DeleteConfigs failed. Check fault information, System.ArgumentException --> username
The configuration file is deleted, and cannot be seen on the configs page, yet the error persists when I try to do other device configuration.
Does anyone know what is going on and how to fix this?
I am a little confused as to why this clean install is having so much problems. 