ULX Slay Command Crashes TTT Server

[Deathstrike]

Hello, I have ULX admin mod installed on my server, and whenever I try to slay someone or myself, the server crashes and this is what shows up in console.log:

[ERROR] gamemodes/terrortown/gamemode/player.lua:685: Tried to use a NULL entity!
  1. Send - [C]:-1
   2. unknown - gamemodes/terrortown/gamemode/player.lua:685
    3. Kill - [C]:-1
     4. call - addons/ulx/lua/ulx/modules/sh/fun.lua:85
      5. __fn - addons/ulib/lua/ulib/shared/commands.lua:943
       6. unknown - addons/ulib/lua/ulib/shared/commands.lua:1306
        7. pcall - [C]:-1
         8. pcallError - addons/ulib/lua/ulib/shared/util.lua:534
          9. fn - addons/ulib/lua/ulib/server/concommand.lua:67
           10. unknown - addons/ulib/lua/ulib/shared/hook.lua:179



[ERROR] gamemodes/terrortown/gamemode/player.lua:685: Tried to use a NULL entity!
  1. Send - [C]:-1
   2. unknown - gamemodes/terrortown/gamemode/player.lua:685
    3. Kill - [C]:-1
     4. call - addons/ulx/lua/ulx/modules/sh/fun.lua:85
      5. __fn - addons/ulib/lua/ulib/shared/commands.lua:943
       6. unknown - addons/ulib/lua/ulib/shared/commands.lua:1306
        7. pcall - [C]:-1
         8. pcallError - addons/ulib/lua/ulib/shared/util.lua:534
          9. fn - addons/ulib/lua/ulib/server/concommand.lua:67
           10. unknown - addons/ulib/lua/ulib/shared/hook.lua:179