Some of you were reporting a high-consumption while enabling the plugin: There were a bug that duplicated the mine blocks on each restart, causing eventually to be too much for the server.
Now that bug it's fixed, but I strongly recommend to those who were using the previous versions that they re-create all their mines (or load an old CustomBlocks/Mines.json file if you have one).

Also, I've added a report system that will send me any crash so I can fix it, and the command '/mineit report [contact] [report]' to report any abnormal behavior.

Sorry for the inconvenience.