As always, please provide the version of this plugin you are using and the version of Sponge(and forge if you are using SpongeForge). Then also provide a link to pastebin with the full server log.
I purchased this plugin three years ago for one project, and I got to say that plugin is regularly updated and new features added. WooCommerce Lottery result extends popular WooCommerce plugin with lottery/competition/ lucky draw features.
This plugin adds a Lottery product type to WooCommerce that you can use to sell tickets for lotteries, raffles and prize drawings.