Fiori "Approve Leave Request" Problem

Hello,

When user wants to approve leave request, after pressing Approve button, there is an error with inf: "Http Status 400"

In chrome request infor look like this:

1. /sap/opu/odata/GBHCM/LEAVEAPPROVAL;o=ID6_800/ApplyLeaveRequestDecision?SAP__Origin=%27ID6_800%27&RequestId=%2700163E5BE3C11ED3B1ABED501F90E462%27&Version=1&Comment=%27%27&Decision=%27PREPARE_APPROVE%27
2. Request Method:POST
3. Status Code:400 Bad Request

Please for suggestions

Tags edited by: Michael Appleby