WoWInterface - Postal window not opening in 2.1.8

I found three lua errors:

Lua Code:

x1  Auc-Advanced\CorePost.lua:1413: Attempt to register unknown event "NEW_AUCTION_UPDATE"
Stack: [string "=[C]"]: in function 'RegisterEvent'
[string "@Auc-Advanced\CorePost.lua"]:1413: in main chunk
Time: 2020/04/23 18:22:20 Index: 3/4
RealUI Version: 2.1.8
Locals:
(*temporary) = <unnamed> {
    0 = <userdata>
}
(*temporary) = "NEW_AUCTION_UPDATE"

Lua Code:

x1  Auc-Advanced\CoreConst.lua:229: attempt to call global 'GetAuctionItemSubClasses' (a nil value)
Stack: [string "@Auc-Advanced\CoreConst.lua"]:229: in main chunk
Time: 2020/04/23 18:22:20 Index: 2/4
RealUI Version: 2.1.8
Locals:
lib =  {
    ENCHANT = 26
    LASTENTRY = 27
    IEQUIP = 5
    MAXSKILLLEVEL = 800
    AMHIGH = 19
    AC_ClassNameList =  {}
    FACTOR = 25
    MINBID = 15
    FLAG_UNSEEN = 2
    AucMinTimes =  {}
    FLAG = 21
    FLAG_DIRTY = 64
    CompactRealm = "Pozzodell'Eternità"
    ALEVEL_MAX = 5
    EquipEncode =  {}
    PlayerName = "Faxthemax"
    MAXITEMLEVEL = 1100
    ITEMID = 23
    PlayerRealm = "Pozzo dell'Eternità"
    AC_SubClassIDLists =  {}
    DEP2 = 10
    ISUB = 4
    ALEVEL_HI = 4
    ScanPosLabels =  {}
    ULEVEL = 14
    BUYOUT = 17
    MAXUSERLEVEL = 120
    AC_ClassIDList =  {}
    ALEVEL_MED = 3
    ITYPE = 3
    ALEVEL_LOW = 2
    AucTimes =  {}
    ALEVEL_MIN = 1
    NAME = 9
    FLAG_EXPIRED = 128
    CURBID = 18
    MAXBIDPRICE = 99999999999
    COUNT = 11
    SEED = 27
    SUFFIX = 24
    AC_SubClassNameLists =  {}
    CANUSE = 13
    SELLER = 20
    LINK = 1
    ILEVEL = 2
    FLAG_FILTER = 4
    TIME = 8
    TLEFT = 7
    BONUSES = 22
    AucMaxTimes =  {}
    QUALITY = 12
    SUBCLASSID = 4
    ALEVEL_OFF = 0
    MININC = 16
    PRICE = 6
    CLASSID = 3
}
(for generator) = function =[C]
(for state) =  {
    1 = 2
    2 = 4
    3 = 1
    4 = 3
    5 = 8
    6 = 0
    7 = 16
    8 = 7
    9 = 9
    10 = 17
    11 = 12
    12 = 15
}
(for control) = 1
index = 1
classID = 2
(*temporary) =  {}
(*temporary) = nil
(*temporary) = 2
(*temporary) = "attempt to call global 'GetAuctionItemSubClasses' (a nil value)"

Lua Code:

x1  nibRealUI\Modules\InterfaceTweaks.lua:136: attempt to index upvalue 'ticker' (a nil value)
Stack: [string "@nibRealUI\Modules\InterfaceTweaks.lua"]:136: in function 'setEnabled'
[string "@nibRealUI\Modules\InterfaceTweaks.lua"]:40: in function '?'
[string "@RealUI_Bugs\Libs\CallbackHandler-1.0\CallbackHandler-1.0-7.lua"]:119: in function <...ugs\Libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:119>
[string "=[C]"]: ?
[string "@RealUI_Bugs\Libs\CallbackHandler-1.0\CallbackHandler-1.0-7.lua"]:29: in function <...ugs\Libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:25>
[string "@RealUI_Bugs\Libs\CallbackHandler-1.0\CallbackHandler-1.0-7.lua"]:64: in function 'Fire'
[string "@Bartender4\libs\AceEvent-3.0\AceEvent-3.0-4.lua"]:120: in function <Bartender4\libs\AceEvent-3.0\AceEvent-3.0.lua:119>
Time: 2020/04/23 18:22:20 Index: 1/4
RealUI Version: 2.1.8
Locals:
None