Cant load asset - Invalid Key Exception

We are using addressables for almost a year already and I thought I could handle them but apparently I cannot. So far we’ve been using addressables for loading scenes but now we want to extend the system to loading assets. So here is my current test setup:

All I want is to instantiate the ‘LoungeChair2’. Loading it using Addressables.LoadAssetAsync("keyOfTheAsset"); resulted in an Invalid Key Exception. Because I thought it my be due to a invalid string I tried the following code:

foreach(IResourceLocator r in Addressables.ResourceLocators)
            {
                Debug.Log("Locator ID: " + r.LocatorId.ToString());

                foreach(object k in r.Keys)
                {
                    Debug.Log("Locator Key: '" + k.ToString() + "'");

                    if(k.ToString().Equals(key))
                    {
                        AsyncOperationHandle<GameObject> handle = Addressables.LoadAssetAsync<GameObject>(k);

                        while (!handle.IsDone) { yield return null; }

                        yield return handle.Result;
                    }
                }
            }

I cycle though all keys that are currently loaded and load on of them. So the key cannot be invalid?! But somehow it still is? What am I missing out? Catalog, dependencys are loaded before and addressables are instantiated.The console looks like this:

Took me some struggling and debugging to solve the problem: I wasn’t loading a GameObject but a ScriptableObject so the key was invalid not because of the name but due to a wrong type.