Cerber and Hummingbird breaking my admin login

Hi,
I wonder if any other Cerber users have come across this problem, I have narrowed it down to Cerber and Hummingbird plugins.
The login admin page is devoid of any styling and the form is plain boxes located at the top left of the page, however when you click login it takes me to the dashboard but when using localhost the dasboard is all broken and only lists a series of links with no styling.
The cause – Cerber and hummingbird plugins activated and the humming bird asset optimisation activated.
If I deactivate cerber only everything works fine
If I activate cerber then deactivate hummingbird asset optimisation(the hummingbird plugin is still activated) the login page is fine but if I reactivate hummingbird asset optimisation the login page breaks.
There is obviously some conflict going on but I am not clever enough to figure it out.