Our logs show that the owner of the page deleted the files. There’s nothing we can do about restoring them, they are permanently deleted.
Because of the jam’s settings, new uploads are locked. (The lock does not prevent you from deleting files though).
If you want to re-submit you can remove your game from the jam, upload the files, and ask the jam host for a late submit link. Note that you will want to check with the host first if they will even allow this per the rules of their jam.