If you attempted to simply "download as zip", you will also need to manually download various Zen Cart 1.6.x dependencies (such as Aura Web). This post has some additional information on doing this manually.
If you instead checkout the code using git and set your git client to "include git sub-modules" on checkout, all should work... Or you can manually tell git to initialize and update the submodules after checkout ("git submodule init" and "git submodule update")...
The glass is not half full. The glass is not half empty. The glass is simply too big!
Where are the Zen Cart Debug Logs? Where are the HTTP 500 / Server Error Logs?
Zen Cart related projects maintained by lhûngîl : Plugin / Module Tracker