This anomaly was observed on Windows 10 machine.
Step to reproduce:
reindexing will appear to be successful, however the HPO version will not be available
after restarting the instance, all
buttons are no longer available on the Administration: Vocabularies page
Marked as regression as reindexing HPO in PhenoTips ver 1.3.9 (on the same machine) works as expected.
Feb 13, 2019: in ver 1.3.10 reindexing works as expected