Cannot determine own RFC destinations

What causes this issue?

The system was unable to determine its own RFC destination. This is
caused by an error with RFC communication.

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?

See the RFC documentation for help on testing and correcting the
problem.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.