Maybe I am wrong, but trade log on sierra chart also then gives basically the same infomation as
!1: Failed to confirm historical orders
!1: Sync hist orders failure.
I guess maybe the Problem could be that SC Sim Account does't have any orders, so they can't be retrieved.
Might be different if SC Sim Account is for example a Rythmic Papertading account (real demo account).
I also tried the earlier version online, same messages.
If you need moore log, etc, I may proviide it.