Kaltura_Client_Exception thrown

Invalid KS "ZTE2NzAwZmMwMGQwZTM3ZjJmYjRhOTc3OTNiYmRmOGFhZDYyMzE0M3wxMDE7OzE0NzUyMDc1MDQ7MjsxNDc1MTIxMTA0LjEzOTY7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"