I'm using KDE Neon 5.14, Kernel 4.15.0-36-generic. The system has been recently updatet to Bionic Beaver.

I was playing around with R Studio, installing new packages and restarting R several times. I didn't do anything else, at least not purposedly.

Then my Dropbox reported that it's disconnected and I can't access my files locally. I just connected it anew, but then I found that my other folder inside the home folder are gone too.

What can be the cause? Help me, please.