Kaltura_Client_Exception thrown

Invalid KS "YjI2YmZjZTAxNWVmN2I4MjhhOWQxNDRjNzFiNWY5ODk3MDE5OTdlMnwxMDE7OzE0Njk0MTcxMTY7MjsxNDY5MzMwNzE2LjIyNDU7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"