Seriell 2.2.3 New Device Problem

[Slin_Slin]

open a terminal and type this to execute the app:

Code:

openplotter-serial

Paste here any error in the terminal after trying to set your device.

EDIT: before this test go to settings - system log and click "Debugging mode".

Code:

pi@openplotter:~ $ openplotter-serial
Traceback (most recent call last):
 File "/usr/lib/python3/dist-packages/openplotterSerial/openplotterSerial.py", line 560, in on_update_Serialinst
   self.conf.set('UDEV', 'Serialinst', str(self.Serialinst))        
 File "/usr/lib/python3/dist-packages/openplotterSettings/conf.py", line 72, in set
   self.write()
 File "/usr/lib/python3/dist-packages/openplotterSettings/conf.py", line 52, in write
   with open(self.conf_file, 'w') as configfile:
PermissionError: [Errno 13] Permission denied: '/home/pi/.openplotter/openplotter.conf'

How I can fix this PermissionError?