How To Fix /UI2/FDM_PARSER003 - Node level &1 not expected in parser

/UI2/FDM_PARSER003 - Overview

• Message type: E = Error

• Message class: /UI2/FDM_PARSER -

• Message number: 003

• Message text: Node level &1 not expected in parser

Self-Explanatory Message

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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.

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/UI2/FDM_PARSER003 - Details

• The SAP error message /UI2/FDM_PARSER003 Node level &1 not expected in parser typically occurs in the context of SAP Fiori applications, particularly when there is an issue with the parsing of the Fiori Design Mode (FDM) configuration or the metadata of the application.
  
  Cause:
  
  Incorrect Metadata Structure: The error often arises when the metadata structure of the application does not match the expected format. This can happen if there are changes in the underlying data model or if the application is not properly configured.
  Version Mismatch: If there is a version mismatch between the Fiori front-end server and the back-end system, it can lead to parsing errors.
  Corrupted or Incomplete Configuration: If the configuration files or the application’s deployment is incomplete or corrupted, it can lead to this error.
  Custom Development Issues: If there are custom developments or extensions that do not adhere to the expected structure, it can trigger this error.
  
  
  Solution:
  
  Check Metadata: Review the