The last update didn't change anything technical, so in that case it's probably a corrupt file in the download. Redownload the latest release and make sure you extract it to a new folder instead of overwriting any old data. That should fix the issue
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If you found the issue, it'd be helpful to hear what solved it for you. It's an issue that gets reported from time to time but is never something that seems to be a 'Sileo' issue as much as it is something external to that. If it's a Ren'Py thing, hopefully an engine update will drop soon that'll rectify the issue. Being what it is though, it's not feasibly something our code is causing.