Unable to view old PO

unable to view the Old PO ,its shows only bank page

any suggestions

Could you please share more details? You have create a PO, saved it (e.g. PO-00001). Is it shown in the purchase order list? (also try refresh and F5) Once you select it, the form view is blank? Refresh the browser?

we have created an workflow after some approvals;if we disable the workflow we are able to view .