No write access seadrive client (1.0.11) on macOS High Sierra (10.13.6)

Hi there,

I cant get seadrive client (1.0.11) workinng fully on macOS High Sierra (10.13.6).
Its not an permission or seafile server problem, everything is working fine from a windows pc or through the webclient.

seadrive is installable, can be started, is connected to the server an shows all the content I expect.
But if i want to write (make a folder e.g.) in any library i get a macOS Passwort prompt and then after providing the mac admin passwort the notification “you dont have permission” (1&2)

I checked for the kext from fuse, and it´s there (3). Should there be another seadrive related kext ?
Already installed and reinstalled a number of times. There was no prompt for a kernel exception besides the first time.

Any help or insight is much appreciated.