SessionId->f03babcc-f9e5-452f-9ebe-6731dec2a06e->Convert to xlsx->You document is not xbrl or ixbrl file.
@ pridvi.skater_at_gmail.com,
It looks you are converting XBRL/iXBRL to XLSX file format. Kindly do provide your sample code (runnable) or preferably a sample console application and sample (input) file with latest version of Aspose.Finance for .NET API (you may zip the files prior attaching), we will check it soon.