Kaltura_Client_Exception thrown

Invalid KS "ODg0ODY2ODk5ZjY3OTc2ZmZjNzMzNDIxODEyOWZlNmFlNjcxZTJkYXwxMDE7OzE0NzQ5Nzk1MDM7MjsxNDc0ODkzMTAzLjI1Mzk7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"