Sudden Error 404 on API request.

Greetings.

I am a developer of the NFP donation management system "dTracker".  (Developer account 10463272.)

One of our users, Navigators (Client account 7451599) has suddenly started to get a Server Error "404 - File or directory not found" when dTracker attempts to get a list of Job Codes.

There seems to be no apparent reason for this error.  It does not use the MYOB API Client and this part of our code has not been changed since Aug 2021.  The system has been working fine up to last week and as far as I can see, there isn't any problems with the request data.

Thank you,

James