I have seen this error when using a Chrome browser. ""I think"" my error was caused by invalid dates in the date field that I was using for my histogram. There were some dates that were for years 2017, 2031, etc. The histogram tried to determine a valid interval based on these bad dates; however, the interval defaulted to "milliseconds". This caused the "Visualize unknown error" like the one that you're experiencing. In your troubleshooting, perhaps you can start by ensuring that there are no invalid dates in your data.
Caveat -- I am a new ELK stack user, so I could be way off-base!