Means you're missing a specific DLL that the module depends on. Visual C++ runtime maybe.
It's likely wkPackets.dll which was required by older versions, but is now out of date and causes problems if present.
If you're using The Wheat Snooper to host, you
must update to
2.9.3, else it will keep trying to downgrade the module and cause you issues, such as skipped packets. Also, older versions will stop working after January 1st, 2016.