I am having the exact same problem.
I am on the same build (FreeNAS-9.3-STABLE-201506292130) and get a "Unable to find template!" error on jail creation as well.
A week ago I still was able to create a jail, so I am not sure what changed in the meantime.
I am on the same build (FreeNAS-9.3-STABLE-201506292130) and get a "Unable to find template!" error on jail creation as well.
A week ago I still was able to create a jail, so I am not sure what changed in the meantime.