Kaltura_Client_Exception thrown

Invalid KS "ZjJkMWFhZGM0NjY4MmM4YzUzNmZhMDk3ZDI2ZjQzOTM4NTE1ZjNjOHwxMDE7OzE1MDA2NTY1ODk7MjsxNTAwNTcwMTg5LjEwODM7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"