I can't figure out how to use LoadAssets()

I have a list of asset references, and I want to load them all and do something once they are all loaded.

Code (CSharp):

1.  
2. public List<AssetReferenceGameObject> SpawnableAssets = new List<AssetReferenceGameObject>();
3.  
4. public void PreloadAssets()
5. {
6.     Addressables.LoadAssets<AssetReferenceGameObject>(SpawnableAssets, opCallback);
7. }
8.  
9. private void OnPreLoadComplete(IAsyncOperation<AssetReferenceGameObject> op)
10. {
11.     Debug.Log("Pre-load complete");
12. }
13.  

The purpose here is that once my "SpawnableAssets" list will be loaded, I will be able to instantiate them instantly via

Code (CSharp):

1.  
2. // Note: I need to instantiate like this because I cannot instantiate them in async in this project. My assets need to be ready for instant instantiation
3. GameObject.Instantiate(SpawnableAssets[i].Asset);
4.  

However, get the following errors and my "Pre-load complete" never shows:

Does anyone have ideas? I haven't been able to find proper examples of LoadAssets(). I also do not really understand the purpose of the "callback" passed as argument to "LoadAssets", when the method returns the IAsyncOperation anyway

 

Code (CSharp):

1. public List<AssetReferenceGameObject> ...

Instead of AssetReferenceGameObject, try a list of string or AssetReference, where the string is the address or the AssetReference is simply set via the addressable asset dropdown.

Edit : also, you probably should be doing a yield return

Code (CSharp):

1. yield return Addressables.LoadAssets<AssetReferenceGameObject>(listOfAddresses, opCallback);

Which means you'd want PreloadAssets() to return IEnumerator.