1. Check version number of NinjaTrader. Click 'Control Center - Help - About', see Version. Version is not supported at this moment. Use prior version of NinjaTrader, please. We are working on this issue.
  2. Check what version of NinjaTrader you are running - 32 or 64 bit.
    For 64-bit NinjaTrader 8 install MZpack 64-bit version (recommended)
    For 32-bit NinjaTrader 8 install MZpack 32-bit version.
    We don't recommend using MZpack 32-bit version with 64-bit NinjaTrader 8 on 64-bit Windows.