<html><head></head><body><div class="ydpfcd22305yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div><div>When first I run GRASS GIS 7.6.0, there is an error message : </div><div><br></div><div>```</div><div>(gis_set.py:4772): Gtk-WARNING **: 16:05:43.648: Theme parsing error: </div><div>gtk.css:2:33: Failed to import: Error opening file </div><div>/home/mega/.config/gtk-3.0/whisker-tweak.css: No such file or directory</div><div>```</div><div><br></div><div>I ignore the message. I start GRASS GIS. I import raster and vector. I add raster as RGB. </div><div><br></div><div>Image is displayed in map display window. Then I choose Imagery > classify image > Interactive input for supervised classification. Then GRASS GIS supervised classification tool appear. </div><div>But, no image in training area display and preview display. Then I import training area from vector map. </div><div><br></div><div>Suddenly, all window GRASS GIS quit except GRASS GIS terminal window. </div><div><br></div><div>So, how to solve this problem? I run in MX Linux 19.</div></div></div></body></html>