The same issue for me. Here is exception in my log.
NullReferenceException
at (wrapper managed-to-native) UnityEngine.Component:InternalGetGameObject ()
at UnityEngine.Component.get_gameObject () [0x00000] in <filename unknown>:0
at Equippable.Init () [0x00000] in <filename unknown>:0
at Equippable.GetValue () [0x00000] in <filename unknown>:0
at Item.GetSellValue (.Store store) [0x00000] in <filename unknown>:0
at Item+StoreItem.GetTooltipContent (UnityEngine.GameObject owner) [0x00000] in <filename unknown>:0
at UIAbilityTooltipContent.Refresh () [0x00000] in <filename unknown>:0
at UIAbilityTooltip.RefreshContent () [0x00000] in <filename unknown>:0
at UIAbilityTooltip.Update () [0x00000] in <filename unknown>:0
(Filename: Line: -1)