Kaltura_Client_Exception thrown

Invalid KS "ODA0MThjMTQ5MzQ0YTMxOGVlMTViYTM0MDU3YjU2YTViOTU5NTI4MHwxMDE7OzE0NzQ4NTAxMTM7MjsxNDc0NzYzNzEzLjAyNjU7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"