inpaint: patchmatch invalid selection

Hi, I am trying to use g’mic inpaint multi-scale but keep getting this error


Bildschirmfoto_2018-12-11_21-17-49
What’s the problem?
Thanks in advance
b

try change color for example “#FF0000

does not help. I am not sure. Switched back to Windows, no problem with krita-gmic. unter manjaro 18 it does not work. not sure about the versions though
edit: in windows, it’s g’mic 2.3