WowAce

Suspect the new Enhanced Restoration passive is casuing an issue.

Recieving this error when casting rejuv/regrowth:

Message: Interface/AddOns/LibHealComm-4.0-108/LibHealComm-4.0.lua:818: attempt to perform arithmetic on local 'requiresLevel' (a nil value)
Time: Sat Feb 10 09:30:24 2024
Count: 1
Stack: Interface/AddOns/LibHealComm-4.0-108/LibHealComm-4.0.lua:818: attempt to perform arithmetic on local 'requiresLevel' (a nil value)
[string "@Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua"]:3348: in function <Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:3346>

Locals: self = Frame {
0 = <userdata>
}
event = "COMBAT_LOG_EVENT_UNFILTERED"
HealComm = <table> {
TargetLastTarget = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:3028
GetHealModifier = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:389
OVERTIME_HEALS = 6
TargetLastFriend = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:3024
compressGUID = <table> {
}
UNIT_SPELLCAST_CHANNEL_START = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:2839
GetNextHealAmount = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:412
ALL_HEALS = 23
GLYPH_ADDED = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:2194
UseAction = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:3033
itemSetsData = <table> {
}
currentModifiers = <table> {
}
aurasUpdated = true
GLYPH_REMOVED = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:2194
GetCasterHealAmount = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:553
CASTED_HEALS = 3
UNIT_SPELLCAST_CHANNEL_UPDATE = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:2936
BOMB_HEALS = 16
GetNumHeals = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:685
callbacks = <table> {
}
GLYPH_UPDATED = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:2194
removeRecordList = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:283
getRecord = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:246
GlyphsUpdated = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:2194
Target = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:2987
GetOthersHealAmount = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:540
UNIT_AURA = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:2098
tempPlayerList = <table> {
}
GetPlayerHealingMod = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:384
UPDATE_MOUSEOVER_UNIT = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:2965
ZONE_CHANGED_NEW_AREA = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:2077
healingModifiers = <table> {
}
hotMonitor = Frame {
}
spellData = <table> {
}
guidToUnit = <table> {
}
CHARACTER_POINTS_CHANGED = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:2220
CastSpell = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:3033
DeleteTable = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:204
TargetUnit = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:2987
OnInitialize = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:3222
PLAYER_ENTERING_WORLD = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:2072
equippedSetCache = <table> {
}
unitToPet = <table> {
}
bucketHeals = <table> {
}
talentData = <table> {
}
activePets = <table> {
}
ABSORB_SHIELDS = 8
tooltip = GameTooltip {
}
initialized = true
CastSpellByID = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:3033
CHANNEL_HEALS = 2
PLAYER_LOGIN = <function> defined @Interface/AddOns/LibHealComm-4.0/LibHealComm-4.0.lua:3363
eventFrame = Frame {
}
CHAT_MSG_ADDON = <func

A fix for Rejuv/Regrowth:
Find the block at around line 104 starting with localSpellIDToRank = {} and then add the code directly after it:

local SpellIDToRank = {}
for rankIndex, spellIDTable in pairs(spellRankTableData) do
	for _, spellID in pairs(spellIDTable) do
		SpellIDToRank[spellID] = rankIndex
	end
end

local SoD = { 
    Rejuvenation = { 417057, 417058, 417059, 417060, 417061, 417062, 417063, 417064, 417065, 417066, 417068 },
    Regrowth = { 436937, 436938, 436939, 436940, 436942, 436943, 436944, 436945, 436946 },
    Lifebloom = { 408124 },
}

for i, spell in pairs(SoD) do
    for rankIndex, spellID in pairs(spell) do
        SpellIDToRank[spellID] = rankIndex
    end
end