With duplicati 1.3.4 this was not really an issue because the backup was repeated the next day. But duplicati 2 seems to be stuck in the middle of the current backup somehow when using ftp and this error shows up (i assume it is the same issue but i do not see this error or i do not know where to look at to find).
What is the right way to observe why duplicati 2 is stuck when using the ftp connection method?