When importing a query in Data Explorer:
I am seeing this error pop-up:
Sorry, an error has occurred.
With descriptive error message in console.
Added on my list to fix. 
6 Likes
Fixed via:
https://github.com/discourse/discourse-data-explorer/commit/0d6af9d920da10d58ac9ca1e637675f6298e543c
3 Likes