Kaltura_Client_Exception thrown

Invalid KS "OTQ1MjcyMzU0M2Q0MTNmODMwMzhlZjAzMDQzNDg1MTdhNTY0NTI5MXwxMDE7OzE0ODgxMjYzMDE7MjsxNDg4MDM5OTAxLjg4MTk7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"