PDM WILL NOT WORK WITH WINDOWS EXPLORER

On Monday PDM just started to fail in windows file explorer.  I can access the vault through SolidWorks and some other programs but not through the windows file explorer.  I've logged in and out and restarted my computer to no avail.  This also is the case on tgwo other systems.  Any suggestions?

SolidworksSolidworks Pdm enterprise Pdm