The problem has now been isolated to a failure of the link from a custom web page to open files on my computer. The format is exactly the same as it was last year when I did this successfully. All Internet settings like File Sharing are set to 'On', etc. but it still doesn't work. Any other ideas? Sample URL for access to my files below. It looks exactly like what it should according to FMP online instructions, so what's not working?
The first part of the IP address has been changed for security.