Server went down yesterday with a power outage.  We don't have our ups yet.  We had some bad json files when we restarted but got those restored and all was good until we figured out that no attachments in the browser would download.  The problem is on All computers All Browsers so it's not a PC or Browser issue.  I'm confident it's related to the crash yesterday.  The error we get when we try to download a file is {"message":"Value cannot be null.\r\nParameter name: value"}

I suspect it's a simple fix but have no clue where to start.