Layer properties won't open (raster layer)

Python error after Right-click -> Layer properties in Data Views
2018-10-31T14:35:20     WARNING    Traceback (most recent call last):
              File "C:/Users/ThinkPad/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\enmapboxplugin\enmapbox\gui\dockmanager.py", line 903, in 
              action.triggered.connect(lambda: self.setLayerStyle(lyr, canvas))
              File "C:/Users/ThinkPad/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\enmapboxplugin\enmapbox\gui\dockmanager.py", line 924, in setLayerStyle
              showLayerPropertiesDialog(layer, canvas, modal=True)
              File "C:/Users/ThinkPad/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\enmapboxplugin\enmapbox\gui\layerproperties.py", line 839, in showLayerPropertiesDialog
              dialog = RasterLayerProperties(layer, canvas,parent=parent)
              File "C:/Users/ThinkPad/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\enmapboxplugin\enmapbox\gui\layerproperties.py", line 649, in __init__
              self.initOptsStyle()
              File "C:/Users/ThinkPad/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\enmapboxplugin\enmapbox\gui\layerproperties.py", line 709, in initOptsStyle
              w = func(self.mRasterLayer, extent)
              File "C:/Users/ThinkPad/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\enmapboxplugin\enmapbox\gui\layerproperties.py", line 412, in create
              return SingleBandPseudoColorRendererWidget(layer, extent)
              File "C:/Users/ThinkPad/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\enmapboxplugin\enmapbox\gui\layerproperties.py", line 418, in __init__
              assert isinstance(self.gridLayout, QGridLayout)
             AssertionError
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