Crashes when pressing backup, Ubuntu 17.10

Updated form 18.2.10 to 18.4.30 today

now when using the backup button, I can’t see my network mount in choice list anymore and after backup has saved, button stays depressed and locks program (unresponsive)

system is Ubuntu 17.10 with up to date updates

I cannot reproduce this on a Mac, so I think it is either a problem with your machine/network or Ubuntu. Can users of other operating systems test this?