Solution : https://service.sap.com/sap/support/notes/1651262 (SAP Service marketplace login required)
Key words : 
access request ==> role search screen, prerequisites program error, access request, role search, tcode lookup, lower case, terms ac 10, inputted tcode, solution implement, correction instructions
Related Notes : 
       
| 1640992 | Master Note for SAP Access Control 10.0 - Support Pack 7 | 
| 1613275 | UAM : Unable to add same role to different system. |