"Cannot read property 'removeAttribute' of null" in Chrome...ideas?

One of my users is experiencing an intermittant error when directly (no external URL, not embedded in another web site, etc.) accessing a report on our 9.3.4 Tableau Server using a Chrome browser:

I have my error logging level set to DEBUG but the only log that has info on this is the vizql-client-0.log.  Here's the full output:

2016-08-16 10:23:42.044 -0700 (Fully Integrated Data Analytics Tools,blah.blah\VSIDDAI,21E71EBB0BD4493C822D43F42BCBC315-0:1,V7NMHqoCRGgAAD5syhwAAAGj) catalina-exec-81 : INFO  wgsessionId=NFz6npiL7vM2abMQ4Uw3gi06LR5e4lIw VizqlClient - url: http://ourTableauServer.com/t/fidat/views/Assembly/Dashboard5?:embed=y&:showVizHome=n&:bootstrapWhenNotified=y&:toolbar=top&%3AopenAuthoringInTopWindow=true&%3AbrowserBackButtonUndo=true&%3AreloadOnCustomViewSave=true&%3AshowShareOptions=true&:apiID=handler3

user-agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.65 Safari/537.36

Error #0

name: window.onError

message: Uncaught TypeError: Cannot read property 'removeAttribute' of null

error-mode: onError

stack:

:5 ?

Funny how the error message has the user contact the TS Administrator but the logs don't contain any real useful info

So far my only search results say to turn off ADBlock for the site when using Chrome.  Ideas?