Issue Summary

get error when exporting query results to excel file:

environment:ec2 on ecs

Steps to Reproduce

1. create a new query
2. excute the query,save it ,then download it as excel file

Any other info e.g. Why do you consider this to be a bug? What did you expect to happen instead?

Technical details:

• Redash Version:6.0.0+b8537
• Browser/OS:chrome
• How did you install Redash:run redash by ecs on aws