Bumping this thread since me and my team are having similar issue since we upgraded from 11.7 to 2018.4 last week.
We also upgrade to Publish tool 2.0, we now have intermittant error 400011, sometimes it works, sometimes tool wil error. Our companies current Tableau Server is 10.5.2, I believe they are upgrading to Tableau Server 2018.3 in a couple of months.
My data is very small/summarize, no weird characters, and all string fields are set to VW_String.
Any suggestions here?