Oh yes, Joiplay. I worked on it several hours but it appears to be a crucial plugin that's causing the issue. I could try to fix it now, but joiplay is also constantly updating and may just fix it themselves prior to full release. If not, I'll take a look again when the final product is done.
And also on that note: Probably no more games of this scale from me after this, haha. Thanks for the interest, though! Making a project this large is fun but exhausting and I'll need to dedicate the time to more pressing things in the future, sadly.
(sorry for the confusion, btw, I answered the other questions on one of your replies on the subpages)