Kaltura_Client_Exception thrown

Invalid KS "NTQ3Y2NiNzE2OTRhMDI1MDcyYmI3NDE0MDQ1ZTRiZTJhMWQzZWJiOXwxMDE7OzE0NzUyMzg3MjU7MjsxNDc1MTUyMzI1LjE1MTc7QW5vbnltb3VzO2VkaXQ6Kg==", Error "-1,INVALID_STR"