Kaltura_Client_Exception thrown

Invalid KS "OGJiZThmNzViZTNhM2Y4NzI5MGU4ODIyMzc4MDMyNDdhZDFlODJlN3wxMDE7OzE0NzUyNjM0NDM7MjsxNDc1MTc3MDQzLjc2O0Fub255bW91cztlZGl0Oio=", Error "-1,INVALID_STR"