Control Center -> Edit my files: cannot upload

[space-time]

Sarcany wrote:
Clear your browser cache and history, quit and re-open the browser.

First I tried to delete history and Cookes only for this forum. I closed and restarted the browser. Did not help.

I changed to Chrome and it works. Somethings is wrong with Safari.

Then I switched to the Guest user account, which has no cookie and no history. I tried there, still does not work. I don't think it is a cookie of history issue.