Hi kamlesh ,
Thank you for using GroupDocs.Annotation API.
We are sorry to hear that you are facing such issue. I have reproduced this issue at our end and while investigation i found that Excel files are working fine in GroupDocs.Annotation Front-end. There are some issues in your provided file which is in first sheet content have linked values which is causing issue , kindly remove first sheet (Overview) and load it again hope this will resolve your issue.
Thank you for your cooperation.
Ok, Got your point. so at any point if we upload an excel file with links, it wont get uploaded right??
Yes currently there is limitation in excel file with links but we will discuss it with our product team if it is feasible we will try to remove this Excel limitation with links in GroupDocs.Annotation.
Regarding other Limitations we have General trial limitation applicable for all supporting formats. Please click here for more details.
If you will need any help or you will have any other questions please feel free to ask.