Installed KUbuntu 16.04 from scratch. Editing the configuration file made no difference. To resolve the problem had to move / rename Baloo file extractor. Reproducible: Always Steps to Reproduce: 1. Happened after copying over my backup files / directories to new installation 2. 3.
*** Bug 362153 has been marked as a duplicate of this bug. ***
*** This bug has been marked as a duplicate of bug 353793 ***