A client is having problems uploading PDFs to the server via a file field. They get the error message “The file could not be written to disk.”
I asked them to send me the PDF so I could test and I can upload to the server.
The client is in “Site Admin” member group and I’m in “Super Admin”.
If I disable Apply XSS filtering in the security & privacy section then the client can upload to the server. This is not Ideal.
Could someone please suggest what I need to do to fix this in ExpressionEngine 3.5.4