3342103 - Key User Extensibility apps are not available or read only - SAP S/4HANA Cloud

Getting one of the following issues while trying to use any of the apps for Key User Extensibility (i.e. Custom CDS Views, Custom Fields, Custom Analytical Queries, Custom Logic)

• Create/Edit/Delete/New buttons are disabled or missing
• Getting error message "Application can only be used in the Extensibility Development System" in "Extensibility Inventory" app.
• Getting error message "Items of type XXX must not be edited in this tenant".
• Getting error message "Items of type Custom Field must not be edited in this tenant" in Custom fields app.
• Getting error message "Items of type Custom Reuse Library must not be edited in this tenant" in "Custom Reusable Elements" app.
• Getting error message "Extensibility is not active. Use the customizing tenant instead".
• Getting error "Not able to load the query name prefix or the package name. Adaptation Transport Organizer (ATO) is not configured for this system" in Custom analytical queries app.
• Getting error message "The application is not configured. Find details in SAP Note 2283716".
• Getting error message "Application not configured. Use Extensibility Test tenant".
• Getting error message ""Not Authorized to create Business logic extension" when trying to create a Custom Logic.

SAP S/4HANA Cloud 

There are four possible causes for these issues:  

1. You are using the wrong tenant/system to access Key User Extensibility apps.
2. You are using a Starter System and Key User Extensibility is not enabled yet.
3. The Business Role providing access to the applications is Read Only.
4. There's a hotfix/upgrade taking place over the weekend. In order to confirm which maintenance activities are scheduled, please, check the Maintenance Schedule according to the System Landscape: 2-System Landscape or 3-System Landscape

Please check below the solution for each cause:

1. Key User Extensibility is only available in the Test/Quality System in 2-System Landscapes or in the Development System - Customizing Tenant in 3-System Landscapes. You need to ensure that you're using the correct tenant. 
2. In the SAP S/4HANA Cloud System, cloud starter edition or sales demo partner, extensibility for key users is deactivated by default.
   Extensibility for key users can be activated.
   You can activate it by opening the Fiori application Extensibility Settings and follow the activation process.
3. Set the "Write" access in the Business Role to "Unrestricted". 
4. It is required to wait until those activities are completed. For further details on the functionality that is temporarily disabled, please, check the following documentation.
   For more information on periods and limitations in the Quality and other non-productive systems, please, check the standard deployment model.
   For more information on periods and limitations in the productive systems, plase, check the Blue-Green Software Deployment model.

• KBA 2283716 - Key User Application is not configured
• KBA 3291421 - Application can only be used in the Extensibility Development System
• KBA 3248190 - Items of type XXX must not be edited in this tenant | 3-System Landscape 
• KBA 3338359 - "Not able to load the query name prefix or the package name. Adaptation Transport Organizer (ATO) is not configured for this system" in Custom analytical queries app - S/4HANA Cloud
• KBA 2486898 - Cannot click the new button on Custom Communication Scenarios
• KBA 3309238 - Error message "Items of type Custom Reuse Library must not be edited in this tenant" is displayed when accessing app Custom Reusable Elements in Production System - SAP S/4HANA Cloud
• KBA 3264481 - Error "Application not configured. Use Extensibility Test tenant." when trying to use Key User Extensibility apps
• SAP Help - Key User Extensibility
• SAP Help - Extensibility Settings
• SAP Help - How to define authorizations based on restrictions
• SAP Blog Post | Extensibility in Development System of a 3-System Landscape
• 3040585 - In-APP Extensibility and ATO transports are temporarily disabled
• 3042314 - Hotfix Collection deployment for RISE with SAP S/4HANA Cloud
• 3024158 - Blue-Green Deployment for Hotfix Collection for RISE with SAP S/4HANA Cloud

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