Message type: E = Error
Message class:  ES - ABAP Workbench: Repository Information System 
Message number: 288
Message text: Enter an authorization object
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The SAP error message ES288, which states "Enter an authorization object," typically occurs when a user attempts to perform an action that requires specific authorization objects, but those objects have not been specified or are missing in the context of the transaction or operation being executed.
Cause: Missing Authorization Object: The user is trying to execute a transaction or function that requires an authorization object that has not been defined or is not included in the user's profile. Incorrect Configuration: The authorization checks in the system may not be properly configured, leading to the system not recognizing the required authorization objects. User Role Issues: The user may not have the necessary roles assigned that include the required authorization objects.
Solution: Check User Roles: Verify that the user has the appropriate roles assigned. This can be done by checking the user’s profile in transaction SU01 (User Maintenance) or PFCG (Role Maintenance). Assign Missing Authorization Objects: If the required
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