SAP ArchiveLink (SAP kernel error)

What causes this issue?

A request was to be sent to a content server.
The SAP kernel could not forward the request to the content server.

System Response

An error was reported by the SAP kernel.
The SAP kernel has probably not received a response to its request
because the content server connection is not active or cannot be
accessed (TIMEOUT).

How to fix this error?

Repeat the content server request. If the error still occurs when the
request is repeated, the error cannot be corrected from the
application. Contact your system administrator/content server
administrator.

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.