Checked the error sent by Vince, but as per checking, there is no error when testing it on my side, the error is on the uploading of file and it is the HTTP error 500. Tested the web application multiple times with different files no error encountered, tested it on the remote desktop in the office, no error encountered, requested to test it on Arvin and Nina's side, no error encountered. Advised to test it on a different browser, same error for Microsoft edge and blank for Mozilla, advised to refresh and clear cache and browsing history, did not solve the problem, the file size to be uploaded is at 12 KB only. Vince tried to upload a different file and it uploaded successfully, requested for the file to be sent, and tested it on my side, as per checking, the same error is encountered on my side using the file sent by Vince. Checked the file for checking what is the cause of an error, as per checking, the data on the file is all correct and no other data that might cause the error. Tried to save the file without any changes and tried to upload it again, as per testing, the file was successfully uploaded. Advised Vince to try the same if the same result will be encountered, as per checking, it is. I Can't pinpoint the exact cause of the error in the file but suspected that the cause of the problem is the file itself. The web application will be modified, add validation for the file if it has no problem, and a message for the user to know if there is a problem with the file, the enhancement will be made once the current enhancement is deployed to prod.