Login failed mit "Origin and Referer header are null or do not correspond to request origin"

The login into our authoring system failed with
Origin and Referer header are null or do not correspond to request origin.

How can we fix this ?

Regards
Heiko

are you behind a proxy?..although, in your case Origin and Refere are null, so it might be browser related see CSRF protection at:

We have solved the problem: It was a configuration issue along with restarting the wrong server