I'm trying to get DriveHQ WebDAV to work with my app.  Storing files works fine.  But when I try to fetch a file, the HTTP status code is 200, however the fetched file content is "The specified file doesn't exist".  This should be a 404 status code, except for the fact that the file does exist.  I'm at a complete loss as to what is going on.  This app works with 6 other WebDAV providers, just not DriveHQ.
I'm using "https://webdav.drivehq.com" as the server path.  I have tried this for files in the root folder, and also files in subfolders.  The filename is "simple.txt" so it's not an issue with encoding or spaces.