Cached request processing failed during response serialization for &1

What causes this issue?

The simple transformation used to serialize the OData response during
cached request processing failed.

System Response

The system terminates the request processing with an exception.

How to fix this error?

Re-execute the request.

Procedure for System Administrators

Most likely, the simple transformation has been de-activated although a
request cache entry had been created before. If the problem persists
execute a cache cleanup using transaction /IWFND/CACHE_CLEANUP and check
with report /IWBEP/RS_MGW_ST whether the simple transformation is
de-activated.

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

Error message extract from SAP system. Copyright SAP SE.