Kaltura_Client_Exception thrown

Invalid KS "ZjVjY2I1MDQ1NWE2MjBhNzBiNTI3ZmRhMWU4ZTA4Zjg3NTQzMzdiMXwxMDE7OzE0NzUxNTc1ODg7MjsxNDc1MDcxMTg4LjU5MDI7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"