I've been trying to figure out this problem for a couple days now:

After modifying some gear in NaviCat, I logged in to see this. After hours of troubleshooting, I finally gave up and did a complete reload from scratch (new Git Clone...new database...new builds...everything). I've done this three times now and still get the same exact error - even with absolutely no modified files now.
Yes, I do have all of the latest programs, tools, and redistributables. Everything was running smooth for two weeks until now.
Could someone please point me in the right direction?