Kaltura_Client_Exception thrown

Invalid KS "NjVkNTQ4YzAxYTE5NWMyNWNjNDY0NWMxNGM2NWJmNGRmY2Y0MzIyNXwxMDE7OzE0ODEyNTAwNjI7MjsxNDgxMTYzNjYyLjc2O0Fub255bW91cztlZGl0Oio=", Error "-1,INVALID_STR"