Strange Error (System is no secure)

[Chaos-uk]

Hi all, my logs keep filling up with this error, anyone know what it
means? Happens on all players joining.

System is no secure, kinda concerns me.

Login: [wUK]Psycho
Failed to load 'NULL': Can't resolve package name
Failed to load 'Class None.': Can't resolve package name
Unknown security class [] -- System is no secure.
xPlayer got player TcpipConnection
New Player [wUK]Psycho id= 35159066b4e5a716a03fe6665b184d8f

Thanks

Ian