This is a showstopper for me as well. Thus ends a painful, 2-day attempt to update Unity to 2021.2.15f1. This issue seems related to loading a ScriptableObject with a sub-asset inside it. Most certainly not fixed!

This issue hasn't fixed for me.
editor : unity 2020.3.29f1
addressable : 1.18.19

error : System.Exception: Unable to load asset of type UnityEngine.Sprite from location

(note : this error only happen when trying to load sprite )

I just upgraded to the newest Unity 2021.2.11f1 which then allowed me via Package Manager to upgrade Addressables to 1.19.18 which fixes the issue.

I should note that upgrading Unity automatically upgraded from 1.17.17 (only version I could find which didn't have this issue) to 1.19.17! I had to go into Package Manager and explicitly upgrade Addressables package.

Since this is a showstopper and prevents my game from loading - where can we download 1.19.18 for testing? I just upgraded my project to 2021.2.10f1 and according to the docs (https://docs.unity3d.com/2021.2/Documentation/Manual/com.unity.addressables.html) 1.19.17 is the only supported version. Or can we somehow downgrade to earlier versions of 1.19?

Also started getting this exception with any version AFTER 2020.3.22f1 LTS, including 2021.2.10f1 but only for some of my prefabs. Been pulling my hair out the last few weeks trying to figure out how I can fix this.

Any news on this? It's bothering me for a while now

I have this issue as well after upgrading from 2020.3.17 to 2020.3.26. In my testing it has nothing to do with labels. The error happens when trying to load a ScriptableObject which has a field that is an instance of a custom serializable type. So if you, say, declare some serializable struct and have a field of that type in your ScriptableObject, you will get this error.

Still not fixed with Unity 2021.2.8f1 and Addressables 1.19.17. Had to downgrade to 1.17.17.

System.Exception: Unable to load asset of type UnityEngine.GameObject from location Assets/Core Assets/Graphics/ParticleEffects/KriptoFX/Pack4/Effect24_GroundCrack.prefab.
UnityEngine.ResourceManagement.Util.DelayedActionManager:LateUpdate () (at Library/PackageCache/com.unity.addressables@1.19.17/Runtime/ResourceManager/Util/DelayedActionManager.cs:159)

Same error. After upgrading from Unity 2020 to 2021.2.7f1. Addressables 1.19.3 and 1.19.5.

I also have the same error with 2020.3.25f1 after upgrading from 2020.3.22f1. If I downgrade the exceptions go away. Happens with Addressables 1.19.3 and 1.19.5. If I use Addressables 1.18.19 then I get completely different exceptions (but the exception is always in DelayedActionManager LateUpdate method (line 159).