Kaltura_Client_Exception thrown

Invalid KS "NTM0ZjY0OGYyZWRmZTIwM2Q2ZmVmNDc4YTE1YmZhZWQ0ZTA5Zjk4ZHwxMDE7OzE1MDEyMDI0OTg7MjsxNTAxMTE2MDk4LjM1NzY7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"