Is this something that should have been added automatically or do I have to manually add it?
No, SAIL does all of this stuff on-the-fly in its AGI code. However, something isn't quite right in your case.
So far we've only seen the error message from your log. Can you do us favour? Run the call again but before you do turn on the agi debugger with
agi debug
then run your call and send us the log up to the failure. When you've finished, turn the agi debugger off with
agi no debug
If you are still getting the same error message, it does seem to suggest a problem at Telappliant rather than at your end.
Kind Regards
Selintra