Cataclysm Error 3

This is the DEBUG log:

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12:1:5.841 : Starting log.
12:1:6.42 INFO : Language is set to: 'en'
12:1:16.237 WARNING : opendir [./mods/] failed with "No such file or directory".
12:1:22.219 : couldn't parse color: c_grey
12:1:22.221 : couldn't parse color: c_grey
12:1:22.221 : couldn't parse color: c_orange
12:1:22.222 : couldn't parse color: c_grey
12:1:22.223 : src/main_menu.cpp:856 [bool main_menu::load_character_tab()] Error: data/mods//Red's_Odd_Additions/melee.json: line 57:0: string not closed before end of line


   "color": "orange",

   "symbol": "\",

^
   "material": [ "scale_plutonium_material" ],
10   "volume": 7,
10   "cutting": 75,
10
12:1:29.995 : Log shutdown.
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