Might be wrong placed in the forum.
When I insert the USB300 EnOcean stick in my RPI i do not see any ttyUSB* and looking at the syslog I see an entry:
failed to execute '/lib/udev/mtp-probe' 'mtp-probe /sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.4 1 9': No such file or directory
I googled arround did not see any valuable hint.
Can someone point me where the problem is.