Report not working since upgrade

Hi, I created report that is used everyday via the report wizard. We have just updated our test environment with the latest version. Everything went along smoothly, the only issue is after the update, I can no longer run this particular report.

I have the live environment still running it normally every day, but the newly updated test environment now tells there is a fetch XML error, and will no longer run this one particular report. Oddly doesn't seem to affect any other reports.

Please note, no coding was used to create this report, just the OOB report wizard.