Hi @craig.jamieson,
Looks as though you need to regenerate the Kaltura client libs.
# service httpd stop
# service kaltura-monit stop
# find /opt/kaltura/app/cache/ -type f -exec rm {} \;
# php /opt/kaltura/app/generator/generate.php
# service httpd start
# service kaltura-monit start
Should fix it up..
Do let me know.