unable to generate CSV report - fails w/ Couldn't create report for search - [index_closed_exception] closed,

[MikeD-Respond]

**Kibana version: 7.3.0

**Elasticsearch version:7.3.0

Server OS version: ? IDK

**Browser version: Chrome Version 79.0.3945.88 (Official Build) (64-bit)

**Browser OS version: Windows10 version 1909 (OS Build 18363.535)

Original install method (e.g. download page, yum, from source, etc.):

Describe the bug:

When I try to generate a CSV report from a saved Discover query I get an error:

Couldn't create report for search 'dhcp' - [index_closed_exception] closed,

Steps to reproduce:

1. Open saved Discover query
2. Select Share -> Generate CSV
3. get error Couldn't create report for search 'dhcp' - [index_closed_exception] closed,

Expected behavior:

CSV report to be generated and available to download via Management -> Reports

Screenshots (if relevant):

Errors in browser console (if relevant):

complete error message from Management -> Reporting -> details of error message

Unable to generate report
[index_closed_exception] closed, with { index_uuid="MshOUSAbTmiJnTYgxz5keA" & index="reindexed-v7-prod-metrics-2019.02.12" } :: {"path":"/prod-metrics-*/_search","query":{"scroll":"30s","size":500},"body":"{"stored_fields":["@timestamp","vendor","message"],"query":{"bool":{"filter":[{"multi_match":{"query":"dhcp","type":"best_fields","lenient":true}}],"must_not":[],"should":[],"must":[{"range":{"@timestamp":{"format":"strict_date_optional_time","gte":"2020-01-03T02:46:46.719Z","lte":"2020-01-03T03:01:46.720Z"}}}]}},"script_fields":{},"_source":{"excludes":[],"includes":["@timestamp","vendor","message"]},"docvalue_fields":[],"sort":[{"@timestamp":{"unmapped_type":"boolean","order":"desc"}}],"version":true}","statusCode":400,"response":"{"error":{"root_cause":[{"type":"index_closed_exception","reason":"closed","index_uuid":"MshOUSAbTmiJnTYgxz5keA","index":"reindexed-v7-prod-metrics-2019.02.12"}],"type":"index_closed_exception","reason":"closed","index_uuid":"MshOUSAbTmiJnTYgxz5keA","index":"reindexed-v7-prod-metrics-2019.02.12"},"status":400}"}

Provide logs and/or server output (if relevant):

Any additional context:

[MikeD-Respond]

this might be a duplicate of 18901

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[elasticmachine]

Pinging @elastic/kibana-reporting-services (Team:Reporting Services)

[tsullivan]

Closing as duplicate of #18901