Unable to Export Item Wise Sales Register Report

Hi, Could please help me with this report. Every time I run the report for Item Wise Sales Register filtering 01/01/2011 to date it gives me this reply “504 Gateway Time-out” after exporting. Thank you so much for your immediate response for we really need this report. Thank you

Seems to be working fine in the test account. Which version you are on?
Perhaps you can try exporting the report in parts.
Hope this helps