Resource Reservations weird issue

I have a reported issue from my user that she is unable to edit her own reservations. Also, she had problems making reservation on any resources on a particular day after 1pm.

This is really weird cause other users does not pose an issue on making the reservations or editing the reservations.

The error prompt she receives (i have debugged thru the codes) is usually due to resources availiability not found. Yet the same resources are available to others. There are no codes restriction to which who have access to which resource.

Can anyone help? TIA!