This was a response to the same error you seem to be seeing.
"The browser processing error is not related to an unexpected functionality in Tableau Server.
We are seeing an error that occurs when there is a minor network interruption. The error may only be manifesting from this attempted functionality with Tableau Server. Most of the time, we can see this when the end user client is accessing their network from WIFI or a VPN connection however it is not isolated to said conditions. There may also be a hardware related issue causing the connection to fluctuate.
I would make sure to work with the end user and your internal network IT team to ensure the connection is stable and that possible hardware issues may be affecting their connectivity to the network."
Hope this helps shed some light on the issue and gives you a start.
- Hannah @ Tableau
Thank you very much for the feedback Hannah, I suspected that was the issue. Are there any proactive tests we can do to remote locations that access the Tableau dashboards on server via VPN or Wi-Fi?
You may want to try a third party network protocol analyzer, like Wireshark, to trace http packets.
Interesting thread which brings up the question of who should actually be handling the error. One could argue that the network is in error right and you need to find the underlying cause. That could be hugely hard to do in a massive network. The other handling discussion is around product design. Should Tableau compensate for poor quality networks.
My users experience a mix of networks, some under my control others not, like a public hotspot.
Agrees with Matt's point.
To add my 2 cents..... this didn't happen (much if at all) in previous Tableau releases so product design is definitely playing a part in why we're seeing this error more frequently now.
I'm not a developer so I don't know what's "possible" for handling the issue server side but it seems like there is something that can be done to prevent this from happening (Like what Matt proposed?).
We are getting this error in Tableau 9.0.1 too. Can there be any fix for it in Tableau end?