Cannot download from media library, certain assets not found, displays stuck on downloading files

[Schweminska]

Try this steps from my post in another topic (Before and after the BaseURL part):

Player doesn't download files

It looks like the file has become corrupt. This happens sometimes. Delete your Library folder at C:/Users/morte/Documents/ and the Config under %appdata% and restart the player. After that, reauthenticate the player and the problem should be fixed. Due to your incorrect BaseURL, you should check out these two threads. It might be the same issue: If you havent done yet, disable your thumbnails: Windows automatically creates thumbnails for content in the User folder and will try to do so …

What is your Xibo Player version?