I noticed that the folders i have that has Swedish characters in the name look a bit strange.
For instance the folder “Försäkringar” is now “[color=rgba(0, 0, 0, 0.870588)][size=medium][font=Roboto,]Fo&Awg-rsa&Awg-kringar”[/font][/size][/color]
[color=rgba(0, 0, 0, 0.870588)][size=medium][font=Roboto,]Using Safari and Firefox 58.0.1 on OSX 10.13.3[/font][/size][/color]
Could you try creating a new folder “Försäkringar2” in Runbox7 and see if that works?
It is likely that folders with special characters that was created in RMM6 wont be fully compatible to how Runbox7 works.
Tried creating folder “Łódź”. No error reported, but the folder doesn’t show in the list (RB7 and RB6).
I tried to create one with Swedish characters but it didn’t work
I will create a ticket on this.