Can't load plugin

I can't load the plugin, I keep getting this error:
```
ERROR qml: PluginService: component error dankAudioVisualizer file:///home/claymorwan/.config/DankMaterialShell/plugins/dankAudioVisualizer/DankAudioVisualizer.qml:51 Cannot assign to non-existent property "higherCutoffFreq"
```