The errors are:
1) Assets\Opsive\Shared\Audio\AudioConfig.cs(255,57): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)' and 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)'
2) Assets\Opsive\Shared\StateSystem\StateManager.cs(88,55): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Game.GameObjectExtensions.GetCachedParentComponent<T>(UnityEngine.GameObject)' and 'Opsive.Shared.Game.GameObjectExtensions.GetCachedParentComponent<T>(UnityEngine.GameObject)'
3) Assets\Opsive\Shared\StateSystem\StateManager.cs(93,46): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Game.GameObjectExtensions.GetCachedParentComponent<T>(UnityEngine.GameObject)' and 'Opsive.Shared.Game.GameObjectExtensions.GetCachedParentComponent<T>(UnityEngine.GameObject)'
4) Assets\Opsive\Shared\StateSystem\StateManager.cs(273,45): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)' and 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)'
5) Assets\Opsive\Shared\Audio\AudioConfig.cs(528,71): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)' and 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)'
6) Assets\Opsive\Shared\Game\ObjectPoolBase.cs(367,29): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)' and 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)'
7) Assets\Opsive\Shared\Utility\ListUtility.cs(109,24): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Utility.ListUtility.Any<T>(System.Collections.Generic.IList<T>, System.Func<T, bool>, int, int)' and 'Opsive.Shared.Utility.ListUtility.Any<T>(System.Collections.Generic.IList<T>, System.Func<T, bool>, int, int)'
8) Assets\Opsive\Shared\Utility\ListUtility.cs(139,24): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Utility.ListUtility.GetAny<T>(System.Collections.Generic.IList<T>, System.Func<T, bool>, int, int)' and 'Opsive.Shared.Utility.ListUtility.GetAny<T>(System.Collections.Generic.IList<T>, System.Func<T, bool>, int, int)'
9) Assets\Opsive\Shared\Game\ObjectPoolBase.cs(576,29): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)' and 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)'
I tried just importing the 'new' items in the integration package and still received the same warnings and errors (not sure deselecting the items actually does anything).
1) Assets\Opsive\Shared\Audio\AudioConfig.cs(255,57): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)' and 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)'
2) Assets\Opsive\Shared\StateSystem\StateManager.cs(88,55): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Game.GameObjectExtensions.GetCachedParentComponent<T>(UnityEngine.GameObject)' and 'Opsive.Shared.Game.GameObjectExtensions.GetCachedParentComponent<T>(UnityEngine.GameObject)'
3) Assets\Opsive\Shared\StateSystem\StateManager.cs(93,46): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Game.GameObjectExtensions.GetCachedParentComponent<T>(UnityEngine.GameObject)' and 'Opsive.Shared.Game.GameObjectExtensions.GetCachedParentComponent<T>(UnityEngine.GameObject)'
4) Assets\Opsive\Shared\StateSystem\StateManager.cs(273,45): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)' and 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)'
5) Assets\Opsive\Shared\Audio\AudioConfig.cs(528,71): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)' and 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)'
6) Assets\Opsive\Shared\Game\ObjectPoolBase.cs(367,29): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)' and 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)'
7) Assets\Opsive\Shared\Utility\ListUtility.cs(109,24): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Utility.ListUtility.Any<T>(System.Collections.Generic.IList<T>, System.Func<T, bool>, int, int)' and 'Opsive.Shared.Utility.ListUtility.Any<T>(System.Collections.Generic.IList<T>, System.Func<T, bool>, int, int)'
8) Assets\Opsive\Shared\Utility\ListUtility.cs(139,24): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Utility.ListUtility.GetAny<T>(System.Collections.Generic.IList<T>, System.Func<T, bool>, int, int)' and 'Opsive.Shared.Utility.ListUtility.GetAny<T>(System.Collections.Generic.IList<T>, System.Func<T, bool>, int, int)'
9) Assets\Opsive\Shared\Game\ObjectPoolBase.cs(576,29): error CS0121: The call is ambiguous between the following methods or properties: 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)' and 'Opsive.Shared.Game.GameObjectExtensions.GetCachedComponent<T>(UnityEngine.GameObject)'
I tried just importing the 'new' items in the integration package and still received the same warnings and errors (not sure deselecting the items actually does anything).