When I'm running Settings/Options I get an error.
2017-06-14T11:11:01 1 Traceback (most recent call last):
File "C:/Users/USER/.qgis2/python/plugins\rivergis\rivergis.py", line 344, in options
dlg = DlgSettings(self, widget=widget)
File "C:/Users/USER/.qgis2/python/plugins\rivergis\dlg_settings.py", line 58, in __init__
item = QStandardItem('{0}'.format(layer.name())) #layerId
UnicodeEncodeError: 'ascii' codec can't encode character u'\u0142' in position 4: ordinal not in range(128)
I have found one raster layer with polish characters but it is WMS inactive layer (Geoportal2 - Działki/Numery działek). The problem is fixed now but I wrote this question because it might be helpful to improve the plugin or to fix similar errors.