How To Fix /UI5/APP_API166 - Service is not supported and won't be cached: &1&2&3&4

/UI5/APP_API166 - Overview

• Message type: E = Error

• Message class: /UI5/APP_API -

• Message number: 166

• Message text: Service is not supported and won't be cached: &1&2&3&4

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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/UI5/APP_API166 - Details

• The SAP error message /UI5/APP_API166 Service is not supported and won't be cached: &1&2&3&4 typically indicates that there is an issue with the service being accessed in an SAP Fiori application. This error can arise due to several reasons, and understanding the cause is essential for finding a solution.
  Causes:
  
  Service Not Registered: The OData service that the application is trying to access may not be registered in the SAP Gateway or may not be activated.
  Service Not Supported: The service might not support the required operations (like GET, POST, etc.) that the application is trying to perform.
  Authorization Issues: The user may not have the necessary authorizations to access the service.
  Incorrect Service URL: The URL being used to access the service may be incorrect or malformed.
  Backend Issues: There could be issues in the backend system that prevent the service from being executed properly.
  
  Solutions:
  
  
  Check Service Registration:
  
  Go to the SAP Gateway Service Builder (transaction code