I highly recommend to save your muse file as well to your folder "Creative Cloud Files" so you always have a copy and it maybe very unlikely that both files get corrupted.
Can you upload your file to a shared location such as Creative Cloud, Google Drive, or Dropbox and share it with me over a private message? I can ask around to see if anyone can fix your file.
Thanks, I really appreciate you looking into whether this file can be recovered. I shared it with you over a private message through Create Cloud.