I use a MacBook Pro 13' 2.4 GHz running 10.15.7 - Dropbox says that I am offline, which means that I cannot access files stored online. I am, of course, online as I type this and unproblematically run other programs connected to the internet. I have restarted my computer, I have selected "no proxies" in preferences. Nothing seems to convince Dropbox that I can access my files. Already wasted a day of work.