Ryan,
Thanks for the help so far. Before reaching out to you, I asked our hosting company, and their response was "nothing was changed on the hosting servers".
This new issue happens with any file we try to upload, pdf, png, txt, jpg. AND the files I try to upload are the very same files that we had already uploaded just a few weeks ago (when it was working). So we know nothing has changed with the file, extension, etc. The only difference is I change the file name so the file does not appear like a duplicate. Can you offer any suggestions, JCE log, Joomla logs, etc., that can more definitely point the issue to the hosting company?
Thank you