Hi Srikanth,
As i said above for your version, GBX01HR5 is not required. this addon is not for attachment. If your attachments are not working, its a program error by SAP, and they have mandatory notes for it. As always said, install all the mandatory notes. Below note is for attachment issues and other UI consolidated issues :
For better approach i would recommend to go to SP02, but there are some notes which can be applied on SP01 as well.
These are the complete list of notes for your version, make sure you implement all of this in Frontend and backend. First one should solve the issue, but all other notes have to be applied as well
2166384 - My Leave Requests V2 (UI) : Consolifdated Fixes on SP01
2138939 - My Leave Request V2: Release Build note for SP01
2181842 - My Leave Requests V2(UI) Consolidated UI Fixes
Additional Notes to be applied in the backend (on top of GBX01HR, SP01 )
2143006 - HCM Leave Request: Fixes for multiple issues
2156871 - My Leave Request V2 (OData) : Leave requests which are created through infotype are not modifiable via Fiori My leave request application.
2172416 - HCM Fiori: Leave Request: Error Status not set correctly
2171401 - HCM Fiori: Leave Request Modify / Withdraw not working
2167161 - My Leave Request V2(OData): Workflow does not get triggered for deleted leave requests
2143603 - My Leave Request V2(OData): Enablement of Concurrent Employment
2120494 - My Leave Requests V2 (OData) : Consolidated OData Fixes
2164483 - Caching Issue in when accessing HCM Fiori Leave apps in Internet Explorer
2174151 - Workflow gets triggered on withdrawing rejected leave
2174570 - HCM Fiori: Leave Request: Issues in modifying or withdrawing leave requests
Please ensure all the notes are applied by your basis
Regards,
Tejas