I recommend trying to switch to Porla (https://github.com/porla/porla) which can solve some interesting problems in easy ways. Otherwise, there are alternatives that may be more attractive.
Once Hadouken is installed, access the web interface by heading to http://localhost:7070/gui/index.html.
Please refer to the documentation for more information on how to configure and run Hadouken on your platform.
If you're interested in contributing, we recommend reading through the contribution guidelines.
For further documentation regarding plugins or the JSONRPC API, please refer to the developer documentation.