Kaltura_Client_Exception thrown

Invalid KS "OTkwZjFiYTYzN2U4NjZmNDhiMDgwNzJiOTA3OGY4MDA4MDRmMDlhZXwxMDE7OzE0OTg2MzQ1NDY7MjsxNDk4NTQ4MTQ2Ljc3NTQ7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"