5121

[flado]

Hi
We have an older Ajax application running on a client's server. It was running fine until 2 weeks ago when the server crashed according to the client.
Now, as soon as we try to save any data in the application we get an error, 5121. There is nothing useful in the event-log and nothing we do seems to fix it.

Here's a screenshot of the error.

Here's more info from Chrome:


Can anyone shed any light on this?
We are running DF18.0 and the WebOrder application is running is fine (although, of course that is made with the new framework, and our application is not)
Thank you in advance