earliestDatestamp OAI Validation Error

Dear Community,

I have an issue in configuring the earliest datestamp in my OJS (v. 2.4.8). Full log here :
http://www.openarchives.org/Register/ValidateSite?log=557QR4B3

It said
REQUEST http://jurnal.untirta.ac.id/index.php/fsj/oai?verb=ListRecords&metadataPrefix=oai_dc&until=2018-11-04T11:53:53Z GET

FAIL Failed to extract error code from the response to request: verb=ListRecords&metadataPrefix=oai_dc&until=2018-11-04T11:53:53Z The request specified a date one year before the earliestDatestamp given in the Identify response. There should therefore not be any records with datestamps on or before this date and a noRecordsMatch error code should be returned.

How can I configure the datestamp? I have read some of the topics but still unsolved.
Do I need the site administrator rule to fix this issue?

Thanks!