Unable to generate report TypeError: FieldFormat is not a constructor

Elastic Stack Kibana
1

Hello All,
So I've created a Discover Saved object. When I try to export it into a CSV format report, it throws an error stating:
Unable to generate report
TypeError: FieldFormat is not a constructor

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This saved object used to work fine a couple of weeks ago, this is a recent error.

2

I was able to solve this issue going to Management -> Kibana -> Index patterns and selected the Script Fields tab. There I found out that the Format field was blank. I edited each Script Field and changed the Format dropdown box to a value (Number, string, etc..). Before doing that they were set to Default.

After doing this, I updated the index and was able to generate the report successfully.

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