First enter a logical system

What causes this issue?

The info object catalogs depend on the logical system. You have <ZH>not
</> yet assigned a logical system to the data basis.

System Response

The system will not display any input help until you have made an entry
for the logical system.

How to fix this error?

Assign a logical system to the data basis. Save this assignment.

Procedure for System Administrators

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.