Error loading stylesheet: An unknown error has occurred (805303f4)

While trying to harvest our data through OAI-PMH, we received a feedback from one of the database indexing organization that the xml file that they harvested is corrupted and cannot be opened

when we try to open it, we receive an unknown error with the number 805303f4:

Error loading stylesheet: An unknown error has occurred (805303f4)
OAI 2.0 Request Results

I am clueless so as to how to troubleshoot this. Any inputs/ideas are greatly appreciated. Thank you.

Can someone share their inputs regarding the corrupted XML file while harvesting data through OAI-PMH. Thank you.