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

anyone an idea where to start solving the problem?

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

Sometimes an invalid session id is somehow stuck?