UI5 UploadSet 403 forbidden error for some files

[eachtime]

Hi experts.

I use UploadSet control to upload files, however some files return 403 forbidden error I don't know why. Only some files return the error, usually PDFs and PPTs but not all.

What's stranger is that in some environments it works and others not and for some users and others not.

What could be the reason for this?

[junwu]

probably the virus scan is turned on in your server.

[eachtime]

I don't think it's virus scan as if I send with firefox, it blocks less files than with edge/chrome