Last tested: Oct 6, 2020
This is a pretty weird error that's popped up a couple times. This usually appears when we've pivoted data and there's a conflict in the inputs which causes a Java issue (Stack Overflow).
One option to resolve this issue is to reduce the number of columns in the Explore.
I appreciate you taking the time to make this post so that I know the issue is not isolated to our Looker instance and data.
But I still don’t understand how to fix/workaround this issue within Looker constraints.
Is there more information published somewhere?