@Ramole ,
I am not sure this helps, but the error is looking for a OneDrive for business connection, and an Excel file data source would normally be the reason for this.
Also I now realise Save As will not work as you have to open it first.
With Microsoft support, surely if an app is working, they should be able to retrieve the code?
Also you have mentioned you have previous versions - have you tried restoring any of these and see if they export?
This is only helpful for the future, but I export apps after every change and catalogue them both in a SharePoint Library and off-cloud.