Memory shortage when using the secure store

What causes this issue?

The SAP system experienced a shortage of memory when accessing the
secure storage.

System Response

The status of the system is undefined after this error occurs.

How to fix this error?

Contact your system administrator.

Procedure for System Administrators

The SAP system was not assigned sufficient memory by the operating
system.

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.