I have encountered the same problem.
I think there's a name issue on the iso file on the ovf files.
Here how i was able to install:
-untar the ova file and upload the AS_CTVM_SMALL_8_8_100_0.iso to datastore
-depoly ova file, you get an error but the vm is created
-edit machine setting and just change the iso file on the cdrom to the one you've uploaded to vmware datastore.
-reboot the vWLC and complete installation
Luca