求助大神！Openwrt使用wol出现问题

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求助，我从openwrt软件包里下载了luci-app-wol和wakeonlan，wakeonlan命令能正常使用，但是luci图形操作界面会报错如下，请问大神门该如何解决。
usr/lib/lua/luci/dispatcher.lua:474: Failed to execute cbi dispatcher target for entry '/admin/services/wol'.
The called action terminated with an exception:
/usr/lib/lua/luci/model/cbi/wol.lua:63: attempt to call field 'checkmac' (a nil value)
stack traceback:        
                             [C]: in function 'assert'        
                             /usr/lib/lua/luci/dispatcher.lua:474: in function 'dispatch'        
                             /usr/lib/lua/luci/dispatcher.lua:126: in function </usr/lib/lua/luci/dispatcher.lua:125>