When try to exclude a Node clicking checkbox "Prevent...", save the setting, come back to edit the Node and the checkbox remain unchecked.
Of course nothing happened regarding the Index. I rebuilt it any way but that particular Node still showing in the results.
When trying to uninstall search api exclude, either via drush or UI, throws me an error message and the uninstallation stop.
SQLSTATE[42S22]: Column not found: 1054 Unknown column 'sae_exclude' in 'where clause':
SELECT 1 AS expression
FROM {node_field_data} t
WHERE sae_exclude IS NOT NULL
LIMIT 1 OFFSET 0; Array