I have the same error. I check the Console and I have these logs...

```
error 13:30:17.516820-0500 lsd cannot open file at line 43353 of [378230ae7f]
error 13:30:17.516844-0500 lsd os_unix.c:43353: (2) open(/var/db/DetachedSignatures) - No such file or directory
error 13:30:17.846057-0500 Finder ...