We are truly sorry for the issue you have experience. Honestly, we were acknowledged of this error, but it happened randomly with chance so we could not figure out the real cause. And it is hard to fix it at this moment, because we have not been working with the old engine for a long time.
We are also very glad to receive your generous support, as it will be a great help for the development of "Yggdrasil Chronicles: A Record of Valkadia". If you wish to try the early-access version, please send us a private message to our official fanpage on Facebook. We will contact and send it to you once it is ready, as we truly need some early feedbacks about the game.