Just upgraded to 2018 with PDM Standard, full clean installation.  SW is now crashing, mainly on large assemblies, opening up a drawing of a large assembly...shuts down.  Worked with my VAR yesterday and we noticed SW would immediately crash if the preview tab was selected when clicking on these large assemblies.  This was never a problem on 2017.

Also I'm getting errors related to PDM DB Server "The owner SID on a per-user subscription doesn't exist"  See image:

Anyone else having these errors?