I had the same problem. I deinstalled and reinstalled the game, that solved the problem. Your save files will still be there but it seemed that the file I saved during credits of chapter 15 generated the error. Just make a new save and use the select chapter option :)
Nope, didnt help. I AM able to start from newest chapter but thats not my issue. I like to re-read jokes and certain moments from VNs, and this error doesnt allow me to do so.
