Program error in CO-PA Extractor. See long text

What causes this issue?

A program error has occurred in the CO-PA Extractor. Processing cannot
be continued.

System Response

The program has been cancelled.

How to fix this error?

Check in the OSS System whether any notes already exist for error
message <ZH>RD777</>; the problem might already be known. If you cannot
solve the problem using OSS notes, create a problem message.

Error message extract from SAP system. Copyright SAP SE.