It's very sad that I can't get an answer here.

I followed your recommendations, but unfortunately I did not get the expected result. I've simplified the code as much as possible and put it in one place. below I will attach screenshots of the updated code and the operation of the application. the download takes place before the adapter is created, but I still get the same error when it is completed. could this be related in some way to the fact that asset has earlier versions? although I think the app will always download the latest version of asset. codebase - download process - result -

I tried to completely copy the dump errors - here are the screenshots

if I remove the code that creates the adapter, the background asset is downloaded, therefore the isCompatible(AssetPack) -> Bool method returns true. but it still doesn't help me to get the adapter from the downloaded asset.