The current version of CEP is V2, not V1

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Yup, but the missing hak packs are v150. The module fails to load with CEP2 installed.
For NWN v168, you should be using CEP2 - just download the executable and run it. For those handful of mods that require CEP1, grab that from the legacy download page and then there's one patch that you need (it'll say v166 to v168 or something like that). You can use either the with cloaks or without cloaks versions.
Sorry if that isn't clearer, NWVault can't be accessed from my work computer.
It looks like this is one of those modules. So take a full version and patch once, i.e. patches are cumulative. Thanks