I'm trying to upload a .rfa to the file manager in EE2 but it's giving me the error "File not allowed.". I've added the mime type to config/mimes.php which is just application/octet-stream (I checked used chrome dev tools).
The allowed file type is "All" on both the File Upload Preferences and field type, it's under the servers file size limit and other file types such as .jpg and .zip work fine. I also disabled XSS security check. I've tried it on a different server and it's giving me the same problem. Anything else I can investigate?