Error when trying to access account usage data

Hi,

Received following exception

2016-03-30 13:00:58 [10.10.13.185] [1906336798] [API] [KalturaFrontController->getExceptionObject] ERR: exception 'KalturaAPIException' with message 'Invalid KS [ZmNjYjFmOWIyODgzMzkzOGFhYjBjMjVmZWRmNzY1ZjFmZWEzMzM4MHwtMTs7MTQ2MTkxNTA1ODsyOzE0NTkzMjMwNTguODI4MztiYXRjaFVzZXI7Oy0xOw==]. Error [-1,INVALID_STR]' in /opt/kaltura/app/alpha/apps/kaltura/lib/kCurrentContext.class.php:144