NRE at GetTotalActiveMagicEffectValue

[nikkehsolaris]

ArgumentNullException: key
Parameter name: Null key
at System.Runtime.CompilerServices.ConditionalWeakTable2[TKey,TValue].TryGetValue (TKey key, TValue& value) [0x00008] in <31687ccd371e4dc6b0c23a1317cf9474>:0 at System.Runtime.CompilerServices.ConditionalWeakTable2[TKey,TValue].GetValue (TKey key, System.Runtime.CompilerServices.ConditionalWeakTable2+CreateValueCallback[TKey,TValue] createValueCallback) [0x00024] in <31687ccd371e4dc6b0c23a1317cf9474>:0 at System.Runtime.CompilerServices.ConditionalWeakTable2[TKey,TValue].GetOrCreateValue (TKey key) [0x00000] in <31687ccd371e4dc6b0c23a1317cf9474>:0
at EpicLoot.EquipmentEffectCache.Get (Player player, System.String effect, System.Func`1[TResult] calculate) [0x00000] in <75e419f2c33b4a79bc8962a4e9d432d4>:0
at EpicLoot.PlayerExtensions.GetTotalActiveMagicEffectValue (Player player, System.String effectType, System.Single scale, ItemDrop+ItemData ignoreThisItem) [0x00014] in <75e419f2c33b4a79bc8962a4e9d432d4>:0
at EpicLoot.PlayerExtensions.HasActiveMagicEffect (Player player, System.String effectType, System.Single& effectValue, System.Single scale, ItemDrop+ItemData ignoreThisItem) [0x00000] in <75e419f2c33b4a79bc8962a4e9d432d4>:0
at EpicLoot.MagicItemEffects.ModifyDamage_ItemData_GetDamage_Patch.Postfix (ItemDrop+ItemData __instance, HitData+DamageTypes& __result) [0x0000d] in <75e419f2c33b4a79bc8962a4e9d432d4>:0
at (wrapper dynamic-method) ItemDrop+ItemData.DMDItemDrop+ItemData::GetDamage(ItemDrop/ItemData,int,single)
at (wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition.Glue:ThiscallStructRetPtr<ItemDrop+ItemData::GetDamage,DMDItemDrop+ItemData::GetDamage>(ItemDrop/ItemData,HitData/DamageTypes&,int,single)
at ItemDrop+ItemData.GetDamage () [0x00000] in <05baa8f602af45108818fa8a98d92416>:0
at (wrapper dynamic-method) Attack.DMDAttack::DoMeleeAttack(Attack)
at Attack.OnAttackTrigger () [0x00032] in <05baa8f602af45108818fa8a98d92416>:0
at Humanoid.OnAttackTrigger () [0x00038] in <05baa8f602af45108818fa8a98d92416>:0
at CharacterAnimEvent.OnAttackTrigger () [0x00000] in <05baa8f602af45108818fa8a98d92416>:0

Seeing only on dedicated server log.