Hello,
First of all, please make sure the LB is configured to support sticky sessions.
Secondly, I see your X-Me header says portal.servcast.net, which I imagine is the LB's addr. Change it on each node here:
/opt/kaltura/app/configurations/apache/conf.d/enabled.kaltura.conf
so that is has:
Header set X-Me "YOUR_NODE"
and reload Apache. This is not the reason why it does not work but looking at the X-Me header will indicate which node you hit. Then, you can go to that node and run:
# kaltlog
from the shell to see the errors the request generates, then, go to each relevant log, usually the errors will be stored in either /opt/kaltura/log/kaltura_api_v3.log or /opt/kaltura/log/kaltura_apache_errors.log and look at the lines leading to the final error. If you cannot understand what the root cause is, please paste the relevant lines here so I can further help you.
Thanks,