wacom-gui dies on RHEL 7.6 with a Cintiq Pro 24 about wacom-gui HOT 6 OPEN

[Device]
Name=Wacom Cintiq Pro 24 P
DeviceMatch=usb:056a:037c;
Class=Cintiq
Width=20
Height=12
IntegratedIn=Display;
Styli=0x842;0x84a;0x160802;0x16080a;0x100802;0x10080a;0x140802;0x14080a;0x120802;0x100804;0x10080c;0x100902;0x10090a;0x80842;

[Features]
Reversible=false
Stylus=true
Ring=false
Ring2=false
Touch=false
TouchSwitch=false
StatusLEDs=
NumStrips=0
Buttons=0
---------------------------------------------------------------
[Device]
Name=Wacom Cintiq Pro 24 P
DeviceMatch=usb:056a:037c;
Class=Cintiq
Width=20
Height=12
IntegratedIn=Display;
Styli=0x842;0x84a;0x160802;0x16080a;0x100802;0x10080a;0x140802;0x14080a;0x120802;0x100804;0x10080c;0x100902;0x10090a;0x80842;

[Features]
Reversible=false
Stylus=true
Ring=false
Ring2=false
Touch=false
TouchSwitch=false
StatusLEDs=
NumStrips=0
Buttons=0
---------------------------------------------------------------
[Device]
Name=Wacom ExpressKey Remote
DeviceMatch=usb:056a:0331;
Class=Remote
Width=0
Height=0
IntegratedIn=
Layout=ek-remote.svg

[Features]
Reversible=false
Stylus=false
Ring=true
Ring2=false
Touch=false
TouchSwitch=false
StatusLEDs=Ring;
NumStrips=0
Buttons=18
[Buttons]
Left=A;B;C;D;E;F;G;H;I;J;K;L;M;N;O;P;Q;R;
Right=
Top=
Bottom=
Touchstrip=
Touchstrip2=
OLEDs=
Ring=A;
Ring2=
EvdevCodes=0x100;0x101;0x102;0x103;0x104;0x105;0x106;0x107;0x108;0x109;0x130;0x131;0x132;0x133;0x134;0x135;0x126;0x127;
RingNumModes=3
Ring2NumModes=0
StripsNumModes=0

---------------------------------------------------------------

[root@sulawesi ~]# wacom-gui
local variable 'svg_write' referenced before assignment
local variable 'svg_write' referenced before assignment
Traceback (most recent call last):
  File "/usr/local/wacom-gui/wacom-gui.py", line 741, in <module>
    main()
  File "/usr/local/wacom-gui/wacom-gui.py", line 733, in main
    form = WacomGui()
  File "/usr/local/wacom-gui/wacom-gui.py", line 70, in __init__
    self.refreshTablets()
  File "/usr/local/wacom-gui/wacom-gui.py", line 100, in refreshTablets
    self.tablet_data.get_connected_tablets()
  File "/usr/local/wacom-gui/wacom_data.py", line 63, in get_connected_tablets
    self.__get_libwacom_data()
  File "/usr/local/wacom-gui/wacom_data.py", line 194, in __get_libwacom_data
    if data['pad']['buttons'].__len__() == 0:
KeyError: 'buttons'