Hello there, rajesh.a.m.
Our product team has been alerted about this error you're seeing when downloading reports from QuickBooks to Excel. They are working closely to get rid of the error message.
I suggest contacting our QuickBooks Online team to have your account added to the ongoing investigation. By doing so, we will send you updates through email about the status of the issue.
Should there be any other questions, please don't hesitate to post on the Community space. Have a good one!
