Kaltura_Client_Exception thrown

Invalid KS "NjdkNmE4NzA2MDU2ZWE1ODgxMDU4MTc5YjA5YzYxMGNjN2RkNzVlM3wxMDE7OzE0NzQ5Nzg1ODE7MjsxNDc0ODkyMTgxLjU2MTU7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"