Made achievement checking function a bit less error prone

main.lua

@@ -538,6 +538,8 @@ EID:AddCallback(ModCallbacks.MC_POST_UPDATE, EID.onGameUpdate)
 local hasShownAchievementWarning = false
 local function renderAchievementInfo()
 	if REPENTANCE and game:GetFrameCount() < 10*30 then
+		local hasBookOfRevelationsUnlocked = EID:isCollectibleUnlockedAnyPool(CollectibleType.COLLECTIBLE_BOOK_OF_REVELATIONS or CollectibleType.COLLECTIBLE_BOOK_REVELATIONS)
+		if not hasBookOfRevelationsUnlocked then
 			local hasCubeOfMeatUnlocked = EID:isCollectibleUnlockedAnyPool(CollectibleType.COLLECTIBLE_CUBE_OF_MEAT)
 			if not hasCubeOfMeatUnlocked then
 				local demoDescObj = EID:getDescriptionObj(-999, -1, 1)
@@ -546,6 +548,7 @@ local function renderAchievementInfo()
 				EID:displayPermanentText(demoDescObj)
 				hasShownAchievementWarning = true
 			end
+		end
 	elseif hasShownAchievementWarning then
 		EID:hidePermanentText()
 	end