Tich heroic LUA error

Message: Interface\FrameXML\UnitFrame.lua:973: Usage: UnitName("unit")
Time: 03/26/17 21:46:21
Count: 34
Stack: [C]: in function `UnitName'
Interface\FrameXML\UnitFrame.lua:973: in function <Interface\FrameXML\UnitFrame.lua:972>
(tail call): ?
Interface\AddOns\DBM-Core\DBM-InfoFrame.lua:735: in function <Interface\AddOns\DBM-Core\DBM-InfoFrame.lua:679>
Interface\AddOns\DBM-Core\DBM-InfoFrame.lua:807: in function `Update'
Interface\AddOns\DBM-Nighthold\Tichondrius.lua:499: in function `handler'
Interface\AddOns\DBM-Core\DBM-Core.lua:666: in function <Interface\AddOns\DBM-Core\DBM-Core.lua:653>
(tail call): ?
Interface\AddOns\DBM-Core\DBM-Core.lua:666: in function <Interface\AddOns\DBM-Core\DBM-Core.lua:653>

Locals: (*temporary) = <function> defined =[C]:-1
Message: ...e\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:580: table index is nil
Time: 03/26/17 21:39:28
Count: 1
Stack: ...e\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:580: in function `?'
...e\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:141: in function <...e\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:140>

Locals: self = <unnamed> {
 0 = <userdata>
 UNIT_SPELLCAST_SUCCEEDED = <function> defined @Interface\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:472
 RESURRECT_REQUEST = <function> defined @Interface\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:570
 PLAYER_ENTERING_WORLD = <function> defined @Interface\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:319
 INCOMING_RESURRECT_CHANGED = <function> defined @Interface\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:405
 UNIT_CONNECTION = <function> defined @Interface\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:637
 GROUP_ROSTER_UPDATE = <function> defined @Interface\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:319
 UNIT_HEALTH = <function> defined @Interface\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:591
 UNIT_FLAGS = <function> defined @Interface\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:656
 UNIT_SPELLCAST_INTERRUPTED = <function> defined @Interface\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:503
 COMBAT_LOG_EVENT_UNFILTERED = <function> defined @Interface\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:544
 UNIT_SPELLCAST_STOP = <function> defined @Interface\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:503
 UNIT_AURA = <function> defined @Interface\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:604
 UNIT_SPELLCAST_START = <function> defined @Interface\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:450
}
event = "RESURRECT_REQUEST"
casterName = "Bellanah"
caster = "Player-118-00CCD110"
target = nil
endTime = 292521.763
(*temporary) = <table> {
 Player-1169-076C7D37 = 292521.557
}
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "table index is nil"
UnitGUID = <function> defined =[C]:-1
castingMass = <table> {
}
debug = <function> defined @Interface\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:104
nameFromGUID = <table> {
 Player-118-02F1FF12 = "Sinister"
 Player-1169-076C7C6D = "Glaciera"
 Pet-0-3132-1530-6965-78116-0D0241C7B3 = "Water Elemental"
 Player-118-07BFF493 = "Sentrath"
 Player-118-00ACDB5C = "Chisbonugget"
 Pet-0-3132-1530-6965-416-0E002801D8 = "Gelpit"
 Pet-0-3132-1530-6965-1860-0E00268B38 = "Tanggarth"
 Player-118-00CCD110 = "Bellanah"
 Player-118-005222D0 = "Korhath"
 Player-1169-076C7D37 = "Alantias"
 Player-118-005889C0 = "Gelhiss"
 Player-118-0139A34C = "Sadea"
 Player-118-005237F8 = "Tziva"
 Player-118-00554E5E = "Damia"
}
callbacks = <table> {
 recurse = 0
 events = <table> {
 }
 OnUsed = <function> defined @Interface\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:144
 Fire = <function> defined @Interface\AddOns\AtlasLoot\Libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:85
 OnUnused = <function> defined @Interface\AddOns\Grid\Libs\LibResInfo-1.0\LibResInfo-1.0.lua:163
}
unitFromGUID = <table> {
 Player-118-02F1FF12 = "raid11"
 Player-1169-076C7C6D = "raid8"
 Pet-0-3132-1530-6965-78116-0D0241C7B3 = "raidpet8"
 Player-118-07BFF493 = "raid3"
 Player-118-00ACDB5C = "raid4"
 Pet-0-3132-1530-6965-416-0E002801D8 = "raidpet5"
 Pet-0-3132-1530-6965-1860-0E00268B38 = "raidpet6"
 Player-118-00CCD110 = "raid9"
 Player-118-005222D0 = "raid6"
 Player-1169-076C7D37 = "raid7"
 Player-118-005889C0 = "raid5"
 Player-118-0139A34C = "raid10"
 Player-118-005237F8 = "raid1"
 Player-118-00554E5E = "raid2"
}
guidFromUnit = <table> {
 raidpet8 = "Pet-0-3132-1530-6965-78116-0D0241C7B3"
 raidpet6 = "Pet-0-3132-1530-6965-1860-0E00268B38"
 raid5 = "Player-118-005889C0"
 raid7 = "Player-1169-076C7D37"
 raidpet5 = "Pet-0-3132-1530-6965-416-0E002801D8"
 raid4 = "Player-118-00ACDB5C"
 raid8 = "Playe