SAP Message USMD2026 - Entity type &2, UI element &1: Web Dynpro component &3 cannot be used

Diagnosis The Web Dynpro component &V3& either does not exist or has notimplemented the component interface IF_FPM_UI_BUILDING_BLOCK, and cantherefore not be used for UI element &V1&. INCLUDE CHANGES_CANNOT_BE_SAVED OBJECT DOKU ID TX Procedure Enter an appropriate Web Dynpro component for UI element &V1&.