Fiori Approve requisition (Header) can't fetch item data

Hi,
I am trying to implement approve requisition (approval by header level).
I can see the number of PR I need to approve in the tile,
But when I click, it is HTTP error, and there is dump at the backend (CL_GBAPP_APV_PR_API)
this is because the item number is 00000.
system is new, notes are implemented.
any idea?

Hi Masayuki,
We have the same issue here and our SP level are the following:
GBAPP002 SP07
UIX01EAP SP04
Error in the frontend: {"error":{"code":"/IWFND/CM_BEC/026","message":{"lang":"pt","value":"Erro RFC: Access via 'NULL' object reference not possible."},"innererror":{"transactionid":"5486B3C840FD1830E10000000A5A0C07","timestamp":"20141210160652.9077510","Error_Resolution":{"SAP_Transaction":"Run transaction /IWFND/ERROR_LOG on SAP NW Gateway hub system and search for entries with the timestamp above for more details","SAP_Note":"See SAP Note 1797736 for error analysis (https://service.sap.com/sap/support/notes/1797736)"},"errordetails":[]}}}
Dump in the backend:

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Fiori Approve requisition (Header) can't fetch item data

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