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Elasticsearch API key service must be enabled. It is enabled automatically when you configure Elasticsearch to use TLS on the HTTP interface.
Alternatively, you can explicitly enable the setting within Elasticsearch by opening config/elasticsearch.yml and adding:
xpack.security.authc.api_key.enabled: true
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Fixes a regression in CI integration tests caused by upgrading Enterprise Search and Elasticsearch to 7.8.0 in https://github.com/elastic/app-search-php/commit/bc33eebcb9f909d857a7ac1c085a70609544252f
The CI tests fail with:
This PR adds that setting to Elasticsearch.