Invalid character set

What causes this issue?

The specified character set does not exist.

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?

If the name of the character set is typed correctly, cancel the
operation and return to the main menu of the transaction. Choose the
menu option 'Character sets' and add the required character set. Once
the character set is added, you can use it to maintain printer types.

Error message extract from SAP system. Copyright SAP SE.