Avid Media Composer won’t render, create/edit titles, export files

[Jaylene O’Keefe]

My Avid Media Composer v7.02.1771 (coupled with Genesis NX array storage) won’t render, create/edit titles, import/export files…I think basically any function that normally requires it to create a new file. Sometimes it reports a disc access error, sometimes it does not report an error but doesn’t do the task either.
Could it be a permissions issue, since it has also reported I don’t have disc access to save to a specific folder that I’ve routinely saved to in the past?
Any assistance in how to resolve this appreciated.