No matter the file, old, new, it doesn't matter, when I select to upload the site to FTP Server it shuts down. I restarted computer... nothing. I shut down computer... no change. I updated Muse... no change.
No matter the file, no matter what I do, it just shuts down.
Mac or PC? I ask, because once I had this issue a few years ago , I was able to solve this with "Adobe chat support" by changing user on Mac. Since then the current user on my Mac is "adobetest". But it works .
But my issue may be different from yours, though.
In case there´s no other solution here in this forum I recommend to ask Adobe Chat Support - it might be from India and some people complained heavily in the past about that but it was great in my case.
I allowed to share my computer via "Teamviewer" and that finally did the job.
In case of using Mac: before you try by yourself to add a new user you may save your files via Time Machine.
In Germany the support-page looks like this as of this reading:
I am running into the same problem. I can upload the same site on my MacBook, but my desktop crashes every time I go to upload it to FTP. I need a resolution to this problem as it is for a business website that I maintain for a company that I am leaving to work somewhere else. The Macbook is my personal Macbook, so I need the desktop to work for my replacement.