I am having issues getting Armory to load properly.  It always gets nearly the whole way through Building Databases but then will stop at something like 10 to 30 second remaining.  I notice that when this happens the ArmoryDB process disappears - no error shown in logs, etc and everything seems normal up until this point.  I tried dumping the Armory database folder but I end up with the same scenario.  I tried running ArmoryDB on it's own and in doing that it chugs away just as if it was launched by ArmoryQT and then it exits with this error:

terminate called after throwing an instance of 'std::runtime_error'
  what():  Unexpected network magic bytes found in block data file
Aborted

Any idea what my next steps should be?

I'm running Ubuntu 18.04.4 LTS, Armory 0.96.5, bitcoin v0.18.0.0
I've also tried both running bitcoin manually and allowing Armory to start it.  I am having no issues with bitcoind it's self.

Thanks for any help