Generally we get request timeout error when there is no response in time. Could you please provide complete log details from service center.
There may be many reasons of this error, like there is an API which is not responding or some service / data actions from which not getting result in time, or any error in some SQL query. So it depends on the logic you have implemented on this page.
As getting error only for one page, so I guess you should check logic implemented on this screen. Also check all server actions, service actions, api, sql processing time in service center.
Regards