[Killefit]

I am trying to backup my Fire TV 4k max with adblink. 
I get an IP connection but when I press 'backup' it says 'busybox install failed'. 
The log entry is 'adb: error: target '/data/local/tmp/adblink/busybox' is not a directory'

Any ideas how to fix this?

Thanks and best regards, 
Stefan