System error occurred in RFC LDAP service

What causes this issue?

An internal error has occurred in the RFC-LDAP interface. This may be a
memory bottleneck on the computer that executes the RFC-LDAP interface
or an error in the internal memory management of the interface. It is
probably not a communication problem.

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?

Leave the transaction and then try to execute the operation again. If
the error occurs again, inform the system administrator.

Error message extract from SAP system. Copyright SAP SE.