Problem with CSRF Token?

I have a reload loop inside the backend after login combined with serveral of this error exeptions

Exception #1486500872 in line 75 of /var/www/vhosts/xxxx/xxxx_neos_base_distribution_production/releases/7/Data/Temporary/Production/SubContextDogado/Cache/Code/Flow_Object_Classes/Neos_Flow_Security_Authorization_RequestFilter.php: The action could not be executed because you supplied no or the wrong CSRF protection token.

and in the chrome console:

Host.js?bust=7d8ee3b5?23e7233e:1 uncaught at watchReloadState 
 at takeLatest 
 at reloadState 
 SyntaxError: Unexpected token < in JSON at position 0
    at https://xxxx.de/_Resources/Static/Packages/Neos.Neos.Ui.Compiled/JavaScript/Host.js?bust=7d8ee3b5?23e7233e:561:91593

anyone an idea where to start solving the problem?
thnaks

Did you try emptying the browser cookies and session storage and login again.

Sometimes an invalid session id is somehow stuck?