WowAce

Not sure if this helps but i'm getting this error when I use the drop down to choose the recipient of the mail:

Date: 2019-10-22 16:54:48
ID: 1
Error occured in: Global
Count: 1
Message: ..\FrameXML\FriendsFrame.lua line 2294:
attempt to index local 'accountInfo' (a number value)
Debug:
[C]: ?
..\FrameXML\FriendsFrame.lua:2294: CanCooperateWithGameAccount()
Postal\Modules\BlackBook.lua:370: SortAndCountNumFriends()
Postal\Modules\BlackBook.lua:457: initFunction()
..\FrameXML\UIDropDownMenu.lua:76: UIDropDownMenu_Initialize()
..\FrameXML\UIDropDownMenu.lua:1060: ToggleDropDownMenu()
Postal\Modules\BlackBook.lua:41:
Postal\Modules\BlackBook.lua:36
Locals:

AddOns:
Swatter, v8.2.6377 (SwimmingSeadragon)
Bartender4, v4.8.8
DBMCore, v8.2.24
DBMDefaultSkin, v
DBMStatusBarTimers, v
DBMVPVEM, v9.0.0
Decursive, v2.7.6.4
DugisGuideViewerZ, v5.315
ExtraQuestButton, v80100.14-Release
FlashTaskBar, v
GTFO, v4.51
MasterPlanA, vA
Postal, vv3.6.0
Quartz, v3.5.2
SexyMap, vv8.2.2
Skada, v1.7.6
Stubby, v8.2.6376 (SwimmingSeadragon)
Titan, v5.18.2.80200
TitanBag, v5.18.2.80200
TitanClock, v5.18.2.80200
TitanGold, v5.18.2.80200
TitanLootType, v5.18.2.80200
TitanPerformance, v5.18.2.80200
TitanRepair, v5.18.2.80200
TitanVolume, v5.18.2.80200
TitanXP, v5.18.2.80200
VuhDo, v3.107
VuhDoOptions, v3.107
WeakAuras, v2.15.4
WorldQuestsList, v90
BlizRuntimeLib_enUS v8.2.5.80205 <none>
(ck=301)

This issue is fixed in version v3.6.4.