Dear AngelaIp,
some your provide related question to reply~
Q1. Where does the error message appear?
==> from Google Chrome browser console screen.
Q2. Do you get it as pop-up when you try to upload a file?
==> try to upload a file, just always waiting!
Q3. Do you have a brand new installation?
==> No
Q4. does the error appear in an existing installation?
==> Before add security header, that is ok!
Q5. There are some mime type related settings in VaultServer\web.config which may have some influence.
==> It is include.aspx generate error!
Does the error message appear for all file types? What do you try to upload? txt, cad, xml, xls?
Do you upload with the regular file picker or via Rest API?
==> Before add security header, that is ok! --> This one is a bit unclear. Have you modified security headers in IIS?
Don´t be confused bei include.apsx error. That´s a general page. Error is caused probably by something else.
Dear Anglealp,
i attached error message file ~
So, i has reason believe the program about include.aspx has information security bug.
