Revenue recognition for ref. doc. &3 (proc. &1, org. &2) in &4 failed

What causes this issue?

An error occurred during revenue recognition calculation during
real-time processing of the indicated reference document. The journal
entry for the reference document is created, but not the subsequent
revenue recognition document. Instead, an entry is added to the log.
This entry enables the revenue recognition part to be carried out at a
later time.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.