It seems that something is changed in Assets\Opsive\Shared\Runtime\Utility\Opsive.Shared.Utility.dll by UCC 3.1.3
UIS now fails with:
Assets\Opsive\UltimateInventorySystem\Scripts\UI\Grid\FilterSorter.cs(98,31): error CS1061: 'ItemInfo[]' does not contain a definition for 'ResizeIfNecessary' and no accessible extension method 'ResizeIfNecessary' accepting a first argument of type 'ItemInfo[]' could be found (are you missing a using directive or an assembly reference?)
Could you please investigate?
UIS now fails with:
Assets\Opsive\UltimateInventorySystem\Scripts\UI\Grid\FilterSorter.cs(98,31): error CS1061: 'ItemInfo[]' does not contain a definition for 'ResizeIfNecessary' and no accessible extension method 'ResizeIfNecessary' accepting a first argument of type 'ItemInfo[]' could be found (are you missing a using directive or an assembly reference?)
Could you please investigate?