Hi @suparman
I can access your OAI interface and it seems to work correctly, s. https://ojs.stiead.ac.id/index.php/LQ/oai?verb=ListRecords&metadataPrefix=oai_dc.
Just that the published articles are not listed. This might be the same issue as this one: OAI interface: Only deleted records - #4 by bozana. Thus, could you double check what is the value of the journal setting_name = ‘publishingMode’ in your database table journal_settings i.e. maybe double check/save the settings under Settings > Distribution > Access?
Best,
Bozana