ML currency type but not FI currency type

What causes this issue?

This currency is marked as a material ledger currency, but it is not
integrated in the FI component.

System Response

The currency cannot be used as a material ledger currency.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.