Aggregate submitted data not available

Hi Experts,
I have several forms in my ODK aggregate server. Up until yesterday, I could pull view submissions for all the forms. Unfortunately, today when I try pulling the data for an ongoing survey, the data is not available and keeps redirecting to an empty filed with no data submissions.

I am afraid that the data may be lost but I don't remember deleting anything from aggregate.
Anyone with ideas on what could be happening kindly help.

Kind regards

@TheuriKingori have you checked at the MySQL level if the data is still present in the database ?

I haven't checked but when I use briefcase to export data it is working but on aggregate I am unable to view the submissions.