Okay, I’m back to a computer. Give this a try to see if you can read in your model.
import anvil.media
# in a server function
with anvil.media.TempFile(your_media_object) as file_name:
# Now there is a file in the filesystem with the contents of media object
# The file_name variable is a string of its full path.
my_model = joblib.load(file_name)
Here are the docs I was referring to that detail dealing with media objects and the filesystem.