Hi Ryu,
There is no error message in tcode /iwfnd/error_log.
But there is some error message in browser console
FYI:
2015-06-04 11:59:18 Call to success handler failed: Missing module URL - sap.ui2.srvc.Error: Missing module URL
at new sap.ui2.srvc.Error (http://xxx.xxx.xxx.xxx/sap/bc/ui5_ui5/ui2/ushell/resources/sap/ushell_abap/bootstrap/abap.js:26:6427)
at Object.sap.ui2.srvc.call (http://xxx.xxx.xxx.xxx/sap/bc/ui5_ui5/ui2/ushell/resources/sap/ushell_abap/bootstrap/abap.js:26:1861)
at http://xxx.xxx.xxx.xxx/sap/bc/ui5_ui5/ui2/ushell/resources/sap/fiori/core-min-2.js:42:12670
at XMLHttpRequest.p9 (http://xxx.xxx.xxx.xxx/sap/bc/ui5_ui5/ui2/ushell/resources/sap/fiori/core-min-2.js:42:20355)
at s.E.dispatch (http://xxx.xxx.xxx.xxx/sap/bc/ui5_ui5/ui2/ushell/resources/sap/ushell_abap/bootstrap/abap.js:2:2263)
at XMLHttpRequest.X.handleEvent (http://xxx.xxx.xxx.xxx/sap/bc/ui5_ui5/ui2/ushell/resources/sap/ushell_abap/bootstrap/abap.js:2:3352)
at XMLHttpRequest.h [as _fnHandler] (http://xxx.xxx.xxx.xxx/sap/bc/ui5_ui5/ui2/ushell/resources/sap/ushell_abap/bootstrap/abap.js:2:3611) sap.ui2.srvc core-min-0.js:85
2015-06-04 11:59:18 Failed to load tile: Missing module URL - sap.ui2.srvc.ChipInstance({oChip:sap.ui2.srvc.Chip({sChipUrl:""}),bFullscreen:false}) sap.ushell_abap.adapters.abap.LaunchPageAdapter core-min-0.js:85
2015-06-04 11:59:18 Applauncher Tile not loaded completely - sap.ushell_abap.adapters.abap.LaunchPageAdapter core-min-0.js:85
Failed to load resource: net::ERR_CACHE_MISS
Thanks and Regards,
Praveen