No matter what you put in the URL, curl -X POST -v "http://open-haus.lan/api/system/backup/export?includes[]=plugins&includes[]=env&includes[]=database" > backup.tgz or just curl -X POST -v "http://open-haus.lan/api/system/backup/export > backup.tgz in the tgz archive there is no plugin folder.
No matter what you put in the URL,
curl -X POST -v "http://open-haus.lan/api/system/backup/export?includes[]=plugins&includes[]=env&includes[]=database" > backup.tgz
or justcurl -X POST -v "http://open-haus.lan/api/system/backup/export > backup.tgz
in the tgz archive there is no plugin folder.