Kaltura_Client_Exception thrown

Invalid KS "ZTQ0Y2U0YzdjMmFmYjYwMmY3ODE0MzVmMzAyMDVjODk3MTY5N2VkZnwxMDE7OzE0ODUxODE0MDU7MjsxNDg1MDk1MDA1LjI5NzI7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"