I installed the addon and it initially worked fine but a day later I now get the following

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Date: 2017-11-26 13:32:03
ID: 1
Error occured in: Global
Count: 1
Message: ...Tracker\Libs\LibPetJournal-2.0\LibPetJournal-2.0.lua line 197:
ClearFilters() not called yet
Debug:
[C]: ?
...Tracker\Libs\LibPetJournal-2.0\LibPetJournal-2.0.lua:197: RestoreFilters()
...Tracker\Libs\LibPetJournal-2.0\LibPetJournal-2.0.lua:376: _LoadPetsFinish()
...Tracker\Libs\LibPetJournal-2.0\LibPetJournal-2.0.lua:309: LoadPets()
...Tracker\Libs\LibPetJournal-2.0\LibPetJournal-2.0.lua:422: ?()
...Tracker\Libs\LibPetJournal-2.0\LibPetJournal-2.0.lua:47:
...Tracker\Libs\LibPetJournal-2.0\LibPetJournal-2.0.lua:46
Locals:
(*temporary) = false
(*temporary) = "ClearFilters() not called yet"

AddOns:
Swatter, v7.3.1 (<%codename%>)
Ace3, v
Altoholic, vr183
AtlasLoot, vv8.07.05
AtlasLootBurningCrusade, vv8.07.05
AtlasLootCataclysm, vv8.07.05
AtlasLootClassic, vv8.07.05
AtlasLootLegion, vv8.07.05
AtlasLootMistsofPandaria, vv8.07.05
AtlasLootWarlordsofDraenor, vv8.07.05
AtlasLootWrathoftheLichKing, vv8.07.05
AucAdvanced, v7.5.5724 (TasmanianThylacine)
AucFilterBasic, v7.5.5724 (TasmanianThylacine)
AucFilterOutlier, v7.5.5724.5459(7.5/embedded)
AucMatchUndercut, v7.5.5724.5585(7.5/embedded)
AucStatHistogram, v7.5.5724 (TasmanianThylacine)
AucStatiLevel, v7.5.5724 (TasmanianThylacine)
AucStatPurchased, v7.5.5724 (TasmanianThylacine)
AucStatSales, v7.5.5724.5598(7.5/embedded)
AucStatSimple, v7.5.5724 (TasmanianThylacine)
AucStatStdDev, v7.5.5724 (TasmanianThylacine)
AucStatWOWEcon, v7.5.5724.5613(7.5/embedded)
AucUtilAHWindowControl, v7.5.5724.5575(7.5/embedded)
AucUtilAppraiser, v7.5.5724.5719(7.5/embedded)
AucUtilAskPrice, v7.5.5724.5599(7.5/embedded)
AucUtilAutoMagic, v7.5.5724.5686(7.5/embedded)
AucUtilCompactUI, v7.5.5724.5715(7.5/embedded)
AucUtilEasyBuyout, v7.5.5724.5576(7.5/embedded)
AucUtilFixAH, v7.5.5724 (TasmanianThylacine)
AucUtilItemSuggest, v7.5.5724.5651(7.5/embedded)
AucUtilPriceLevel, v7.5.5724.5633(7.5/embedded)
AucUtilScanButton, v7.5.5724.5631(7.5/embedded)
AucUtilScanFinish, v7.5.5724.5720(7.5/embedded)
AucUtilScanProgress, v7.5.5724.4979(7.5/embedded)
AucUtilScanStart, v7.5.5724.5347(7.5/embedded)
AucUtilSearchUI, v7.5.5724.5721(7.5/embedded)
AucUtilSimpleAuction, v7.5.5724.5705(7.5/embedded)
AucUtilVendMarkup, v7.5.5724.4828(7.5/embedded)
Babylonian, v5.1.DEV.332(/embedded)
BagBrother, v
Bagnon, v7.3.2
BeanCounter, v7.5.5724 (TasmanianThylacine)
Configator, v5.1.DEV.431(/embedded)
DataStore, vr64
DataStoreAchievements, vr46
DataStoreAgenda, vr26
DataStoreAuctions, vr49
DataStoreCharacters, vr41
DataStoreContainers, vr57
DataStoreCrafts, vr78
DataStoreCurrencies, vr36
DataStoreGarrisons, vr22
DataStoreInventory, vr51
DataStoreMails, vr50
DataStorePets, vr43
DataStoreQuests, vr43
DataStoreReputations, vr41
DataStoreSpells, vr31
DataStoreStats, vr30
DataStoreTalents, vr60
DBMCore, v7.3.7
DBMDefaultSkin, v
DBMStatusBarTimers, v
DebugLib, v5.1.DEV.337(/embedded)
Enchantrix, v7.5.5724 (TasmanianThylacine)
EnchantrixBarker, v7.5.5724 (TasmanianThylacine)
Gatherer, v7.3.1
Informant, v7.5.5724 (TasmanianThylacine)
LibExtraTip, v5.12.DEV.430(/embedded)
NPCScan, v7.3.0.6
PetTracker, v7.3.0
PetTrackerBreeds, v7.3.0
PetTrackerConfig, v7.3.0
PetTrackerSwitcher, v7.3.0
PetTrackerUpgrades, v7.3.0
Recount, vv7.3.2a
SlideBar, v7.3.1 (<%codename%>)
Stubby, v7.5.5724 (TasmanianThylacine)
TipHelper, v5.12.DEV.405(/embedded)
BlizRuntimeLib_enUS v7.3.2.70300
(ck=b39)

Now I have uninstalled, reinstalled, installed, deleted folders, uninstalled, delete settings all of the above and it continues.

I also get an error every time I log in.

34x ...Tracker\Libs\LibPetJournal-2.0\LibPetJournal-2.0-31.lua:197: ClearFilters() not called yet
[C]: ?
...Tracker\Libs\LibPetJournal-2.0\LibPetJournal-2.0-31.lua:197: in function RestoreFilters' ...Tracker\Libs\LibPetJournal-2.0\LibPetJournal-2.0-31.lua:376: in function _LoadPetsFinish'
...Tracker\Libs\LibPetJournal-2.0\LibPetJournal-2.0-31.lua:309: in function LoadPets' ...Tracker\Libs\LibPetJournal-2.0\LibPetJournal-2.0-31.lua:422: in function ?'
...Tracker\Libs\LibPetJournal-2.0\LibPetJournal-2.0-31.lua:47: in function <...Tracker\Libs\LibPetJournal-2.0\LibPetJournal-2.0.lua:46>

Locals:
(*temporary) = false
(*temporary) = "ClearFilters() not called yet"

Yes, I have it too

Message: Interface\AddOns\PetTracker\Features\Objectives.lua:78: attempt to perform arithmetic on field 'contentsHeight' (a nil value)
Time: 12/07/17 13:25:06
Count: 1
Stack: Interface\AddOns\PetTracker\Features\Objectives.lua:78: attempt to perform arithmetic on field 'contentsHeight' (a nil value)
Interface\SharedXML\SharedBasicControls.lua:208: in function <Interface\SharedXML\SharedBasicControls.lua:207>
[C]: ?
Interface\AddOns\PetTracker\Features\Objectives.lua:78: in function GetUsedHeight' Interface\AddOns\PetTracker\Features\Objectives.lua:48: in function <Interface\AddOns\PetTracker\Features\Objectives.lua:47> [C]: in function ObjectiveTracker_Update'
[string "*:OnLoad"]:4: in function setFunc' Interface\FrameXML\InterfaceOptionsPanels.lua:89: in function <Interface\FrameXML\InterfaceOptionsPanels.lua:85> [C]: in function pcall'
Interface\FrameXML\InterfaceOptionsFrame.lua:217: in function <Interface\FrameXML\InterfaceOptionsFrame.lua:216>
[C]: in function `securecall'
Interface\FrameXML\InterfaceOptionsFrame.lua:252: in function <Interface\FrameXML\InterfaceOptionsFrame.lua:248>

Locals: errorMessage = "Interface\AddOns\PetTracker\Features\Objectives.lua:78: attempt to perform arithmetic on field 'contentsHeight' (a nil value)"
DisplayMessageInternal = defined @interface\SharedXML\SharedBasicControls.lua:191
MESSAGE_TYPE_ERROR = 0