Hi there,
First of thanks for the amazing addon and for the recent update for the pre-patch. Im currently on version r93-release and I'm not able to send attendance to any other admin. They can't send any raidlogs eihter. It keeps breaking with the following error message. It seems related to the background issue aswell:

2x GuildRaidAttendance\Widgets\Popups.lua:228: attempt to call method 'SetBackdrop' (a nil value)
[string "@GuildRaidAttendance\Widgets\Popups.lua"]:228: in function CreateDataTransferPopup' [string "@GuildRaidAttendance\Comm.lua"]:163: in function <GuildRaidAttendance\Comm.lua:161> [string "=(tail call)"]: ? [string "@BugSack\Libs\AceComm-3.0-12\ChatThrottleLib-24.nil.lua"]:495: in function SendAddonMessage'
[string "@BugSack\Libs\AceComm-3.0\AceComm-3.0-12.lua"]:127: in function SendCommMessage' [string "@GuildRaidAttendance\Comm.lua"]:161: in function SendLogsToRaid'
[string "@GuildRaidAttendance\Frames\RaidLogs.lua"]:313: in function <...rfaceGuildRaidAttendance\Frames\RaidLogs.lua:311>
[string "@GuildRaidAttendance\Widgets\Popups.lua"]:614: in function <GuildRaidAttendance\Widgets\Popups.lua:613>

Locals:
self =

{
NextDate = defined @GuildRaidAttendance\Utils.lua:518
CreateMask = defined @GuildRaidAttendance\Widgets\Widgets.lua:1969
CreateProgressBar = defined @GuildRaidAttendance\Widgets\Widgets.lua:475
UpdateRosterEPGP = defined @GuildRaidAttendance\EPGP.lua:313
ResetDKP = defined @GuildRaidAttendance\DKP.lua:29
CreateDetailButton_DKP = defined @GuildRaidAttendance\Widgets\Widgets.lua:1600
UndoPenalizeDKP = defined @GuildRaidAttendance\DKP.lua:213
RefreshDKP = defined @GuildRaidAttendance\DKP.lua:300
UpdateMainAlt = defined @GuildRaidAttendance\Utils.lua:351
GetGuildRoster = defined @GuildRaidAttendance\Utils.lua:249
FireEvent = defined @GuildRaidAttendance\CustomEvents.lua:35
ShowExportFrame = defined @GuildRaidAttendance\Frames\Export.lua:321
UpdatePlayerData_EPGP = defined @GuildRaidAttendance\Frames\Attendance.lua:1172
DateToWeekday = defined @GuildRaidAttendance\Utils.lua:449
GetLockoutsResetDate = defined @GuildRaidAttendance\Utils.lua:504
CreateIconButton = defined @GuildRaidAttendance\Widgets\Widgets.lua:369
ShowPenalizeFrame = defined @GuildRaidAttendance\Frames\LootSystem\Penalize.lua:149
Copy = defined @GuildRaidAttendance\Utils.lua:156
CreateRow_AttendanceEditor = defined @GuildRaidAttendance\Widgets\Widgets.lua:1308
TableToString = defined @GuildRaidAttendance\Utils.lua:223
DecayDKP = defined @GuildRaidAttendance\DKP.lua:39
CreateSeparator = defined @GuildRaidAttendance\Widgets\Widgets.lua:2006
PenalizeDKP = defined @GuildRaidAttendance\DKP.lua:171
SendLogsToRaid = defined @GuildRaidAttendance\Comm.lua:145
GetDifficultyInfo = defined @GuildRaidAttendance\Utils.lua:330
TContainsKey = defined @GuildRaidAttendance\Utils.lua:132
ModifyEP = defined @GuildRaidAttendance\EPGP.lua:115
Calc = defined @GuildRaidAttendance\Utils.lua:82
CreatePopupSelector = defined @GuildRaidAttendance\Widgets\Popups.lua:721
CreateCheckButton = defined @GuildRaidAttendance\Widgets\Widgets.lua:393
UpdateRosterDKP = defined @GuildRaidAttendance\DKP.lua:256
GetRaidStartTime = defined @GuildRaidAttendance\Utils.lua:553
CheckPermissions = defined @GuildRaidAttendance\Utils.lua:43
ModifyGP = defined @GuildRaidAttendance\EPGP.lua:165
GetMonthNames = defined @GuildRaidAttendance\Utils.lua:423
UnregisterAllCallbacks_EPGP = defined @GuildRaidAttendance\EPGP.lua:353
DecayEPGP = defined @GuildRaidAttendance\EPGP.lua:61
TContains = defined @GuildRaidAttendance\Utils.lua:125
DateOffset = defined @GuildRaidAttendance\Utils.lua:527
DateToSeconds = defined @GuildRaidAttendance\Utils.lua:534
Print = defined @GuildRaidAttendance\Core.lua:22
GetGuildOnlineRoster = defined @GuildRaidAttendance\Utils.lua:277
Remove = defined @GuildRaidAttendance\Utils.lua:179
ModifyPenalizeDKP = defined @GuildRaidAttendance\DKP.lua:186
Round = defined @GuildRaidAttendance\Utils.lua:72