After seeing this exception in device builds, I am now using Packed Play Mode to test. Currently, whenever I do a Build/Build Player Content and then run the game in Packed Play Mode, the first time I run it, I always get an exception like this. Code (CSharp): Exception: Invalid path in RawDataProvider: 'C:/Users/MyUserName/AppData/LocalLow/MyCompanyName/MyGameName/com.unity.addressables/catalog_2019.01.14.11.44.41.hash'. UnityEngine.ResourceManagement.DelayedActionManager:LateUpdate() (at ?) If I stop the game and run in Packed Play Mode again, it doesn't happen (as the file has been created and exists). How to fix this? It looks like it is trying to read the catalog file too soon? Maybe I'm doing something wrong?