I've used it since v1.7.4. This is the best way to manage AC servers, especially on Linux. The code is actively maintained and supported. It has a tonne of valuable features like saving disk by only installing server-side mod content, a permissions system allowing half-trusted friends to set up races and not break all the config, and great integration with Content Manager, Sol, Discord etc. Very much worth a donation to access Premium too.
You should be using the support thread for issues like this! There is probably something wrong somewhere in your config file. If you post in the support thread and share your config file settings we will be able to fix the problem for you!