I keep getting failure notifications when I try to export data from the reports dashboard. Weirdly, only the DAU/MAU export is successful. Help? 
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I am getting similar errors when attempting to export some reports on my hosted and dev sites.
The error I’m seeing is:
Job exception: undefined method `each' for nil:NilClass
That’s being called from /discourse/app/jobs/regular/export_csv_file.rb:59
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@eviltrout we should assign someone here
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Fixed via:
https://github.com/discourse/discourse/commit/0603636cea0a2c6e533f50c58651a6867d279e13
Thanks for reporting this issue, @marcellabarker. 
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