[Nomaddc]

Sadly, DBM is still bugging a lot with RealUI.

For now workaround I found: if DBM gives you errors - go to Add-on control panel and press Reset there. At least it fixed dbm for me. If you Re-initialize realui though errors will be back.

Edit: also got to repeat same procedure on all characters where RealUI initializes.
Error:

4x DBM-StatusBarTimers\DBT.lua:407: attempt to index field '?' (a string value)
DBM-StatusBarTimers\DBT.lua:407: in function 'LoadOptions'
DBM-Core\DBM-Core-6.1.1.lua:1012: in function 'handler'
DBM-Core\DBM-Core-6.1.1.lua:578: in function <DBM-Core\DBM-Core.lua:565>

Locals:
self = <table> {
 MoveSpecialWarning = <function> defined @s\DBM-Core\DBM-Core.lua:8142
 StopLogging = <function> defined @s\DBM-Core\DBM-Core.lua:5355
 CheckVoicePackVersion = <function> defined @s\DBM-Core\DBM-Core.lua:8583
 CopyProfile = <function> defined @s\DBM-Core\DBM-Core.lua:1428
 CHAT_MSG_MONSTER_EMOTE = <function> defined @s\DBM-Core\DBM-Core.lua:4580
 GetTime = <function> defined @s\DBM-Core\DBM-Core.lua:3156
 DeleteProfile = <function> defined @s\DBM-Core\DBM-Core.lua:1445
 UPDATE_SHAPESHIFT_FORM = <function> defined @s\DBM-Core\DBM-Core.lua:3006
 ShowUpdateReminder = <function> defined @s\DBM-Core\DBM-Core.lua:4324
 PLAYER_REGEN_DISABLED = <function> defined @s\DBM-Core\DBM-Core.lua:4388
 CreateModLocalization = <function> defined @s\DBM-Core\DBM-Core.lua:9907
 IsEnabled = <function> defined @s\DBM-Core\DBM-Core.lua:5826
 CHALLENGE_MODE_END = <function> defined @s\DBM-Core\DBM-Core.lua:3148
 Capitalize = <function> defined @s\DBM-Core\DBM-Core.lua:5919
 ADDON_LOADED = <function> defined @s\DBM-Core\DBM-Core.lua:990
 BossHealth = <table> {
 }
 ShowRaidIDRequestResults = <function> defined @s\DBM-Core\DBM-Core.lua:4083
 INSTANCE_GROUP_SIZE_CHANGED = <function> defined @s\DBM-Core\DBM-Core.lua:2339
 GetBossUnitId = <function> defined @s\DBM-Core\DBM-Core.lua:2476
 AddDefaultOptions = <function> defined @s\DBM-Core\DBM-Core.lua:2508
 RegisterEvents = <function> defined @s\DBM-Core\DBM-Core.lua:728
 InfoFrame = <table> {
 }
 FilterRaidBossEmote = <function> defined @s\DBM-Core\DBM-Core.lua:883
 RequestTimers = <function> defined @s\DBM-Core\DBM-Core.lua:5450
 ForceUpdate = <function> defined @s\DBM-Core\DBM-Core.lua:1385
 RequestInstanceInfo = <function> defined @s\DBM-Core\DBM-Core.lua:4152
 CHAT_MSG_MONSTER_YELL = <function> defined @s\DBM-Core\DBM-Core.lua:4576
 LFG_PROPOSAL_SHOW = <function> defined @s\DBM-Core\DBM-Core.lua:2960
 ReleaseRevision = 13132
 RegisterShortTermEvents = <function> defined @s\DBM-Core\DBM-Core.lua:830
 LOADING_SCREEN_DISABLED = <function> defined @s\DBM-Core\DBM-Core.lua:3213
 GetUnitFullName = <function> defined @s\DBM-Core\DBM-Core.lua:2365
 UNIT_DIED = <function> defined @s\DBM-Core\DBM-Core.lua:5431
 ReceiveCombatInfo = <function> defined @s\DBM-Core\DBM-Core.lua:5468
 RegisterCallback = <function> defined @s\DBM-Core\DBM-Core.lua:1167
 FindInstanceIDs = <function> defined @s\DBM-Core\DBM-Core.lua:5967
 UnregisterCallback = <function> defined @s\DBM-Core\DBM-Core.lua:1176
 CHALLENGE_MODE_RESET = <function> defined @s\DBM-Core\DBM-Core.lua:3139
 RepositionFrames = <function> defined @s\DBM-Core\DBM-Core.lua:1468
 LFG_ROLE_CHECK_SHOW = <function> defined @s\DBM-Core\DBM-Core.lua:2952
 Disable = <function> defined @s\DBM-Core\DBM-Core.lua:5810
 ReceiveTimerInfo = <function> defined @s\DBM-Core\DBM-Core.lua:5474
 CHALLENGE_MODE_START = <function> defined @s\DBM-Core\DBM-Core.lua:3118
 RangeCheck = <table> {
 }
 PLAYER_LEVEL_UP = <function> defined @s\DBM-Core\DBM-Core.lua:2639
 LFG_LIST_APPLICANT_LIST_UPDATED = <function> defined @s\DBM-Core\DBM-Core.lua:2985
 ModLists = <table> {
 }
 ShowLag = <function> defined @s\DBM-Core\DBM-Core.lua:1844
 GetCIDFromGUID = <function> defined @s\DBM-Core\DBM-Core.lua:2458
 CreateProfile = <function> defined @s\DBM-Core\DBM-Core.lua:1392
 GetGroupSize = <function> defined @s\DBM-Core\DBM-Core.lua:3164
 DisplayVersion = "6.1.1"
 GetRaidClass = <function> defined @Interfa

I am using alpha version of realui skinner for bossmods.