Expense Report Approval Screen Entirely Blank

Summary

manager attempting to approve exp reports but approval screen coming up blank

Content

One manager experiencing this problem last few weeks: From the expense dashboard, when she clicks on the employee's name to view the report the Expense Report Approval window opens up but it shows completely blank.  See attachment.

This is happening for all 4 reports that are currently awaiting her approval.  She has tried using IE and Chrome.  She has cleared her browser cache. 

Another detail is she is actually the substitute for the manager, not the manager herself, but this is not a new arrangement.  She has been experiencing this blank screen only for the past few weeks but everything was working correctly until then.