Hi there! First of all, I sincerely apologize for the lack of updates and the broken Discord link. You are completely right to point this out.
The good news is: I have just uploaded a massive update! I completely rewrote the core of the plugin. What was originally planned to be a paid 'Premium' version is now completely free and included in this update. The config issues are entirely fixed, the performance is heavily optimized, and new features (like proper Mending support and new GUIs) were added.
Here is the new working Discord link:
https://discord.gg/J77npJVrdp
Thank you for your patience and for the feedback. Please download the latest version, give it a try, and let me know if everything is running smoothly!