Seems that CDash was having some trouble when the first round of Update.xml files were updated:
Submission failed: Cannot connect to the database.
Uploaded: /home/kitware/dashboards/buildbot/vtk_master-duma-linux-shared-release_osmesa_ospray/build/Testing/20190614-0953/Update.xml
Errors occurred during submission.
You can see all of them here: https://open.cdash.org/index.php?project=VTK&date=2019-06-14&filtercount=1&showfilters=1&field1=buildname&compare1=63&value1=LPTImprovements