I am getting something very similar. It actually crashes my system and forces a reboot.
Autopilot.dll WIL error was reported.
HRESULT: 0x80070491
File: onecoreuap\admin\moderndeployment\autopilot\dll\dllmain.cpp, line 138
Message: NULL
Any suggestions to correct this issue? I recently did a windows repair and it said it fixed corrupted files. But obviously it didn't fix this issue.