I've found it while testing the Reloader. After plugin reload, I got:
AttributeError: 'Serval' object has no attribute 'b1SBox'
Traceback (most recent call last):
File "/home/borys/.local/share/QGIS/QGIS3/profiles/default/python/plugins/serval-QGIS_3_port/serval.py", line 351, in point_clicked
self.change_cell_value(new_vals)
File "/home/borys/.local/share/QGIS/QGIS3/profiles/default/python/plugins/serval-QGIS_3_port/serval.py", line 389, in change_cell_value
self.prepare_raster(True)
File "/home/borys/.local/share/QGIS/QGIS3/profiles/default/python/plugins/serval-QGIS_3_port/serval.py", line 548, in prepare_raster
sboxes = [self.b1SBox, self.b2SBox, self.b3SBox]
AttributeError: 'Serval' object has no attribute 'b1SBox'
I've found it while testing the Reloader. After plugin reload, I got: