We found there is the same issue/error in the template file you provided. And, we have found the reason which caused this error. We will fix it soon and let you know about it.
Hi Karthik,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
Please try the attached latest version of Aspose.Cells. Please feel free to contact us if you still face any issue.
Thank You & Best Regards,