NC Desktop: missing folders visible on web

Hi.

I’m experiencing a weird situation: I cannot see on desktop client some folders which are available on the web. It’s missing even in the folder listing, I cannot enable/disable the checkbox!

Even more weird if I remove the sync and start from scratch by removing the folder (not the connection), when I’m asked from which root folder I’d like to start syncing I see the missing one, but in the very next step when I’m asked which folders I’d like to download it’s gone!

Again from web interface I see the folder and I can do everything in it.