https://www.drupal.org/project/environment_indicator/issues/3158628
Add config_export property to EnvironmentIndicator config entity annotation [#3158628] | Drupal.org
Nov 4, 2021 - Since Drupal 8.6.0, it is recommended that configuration entity types include the config_export property in their annotation. See change record: Move schema...
addconfigexportproperty