Hey Rexo, apologies for the delay on this reply.
We're still looking into why this error is being caused, and I know you said you might make a second save, but for the time being, we have skipped Useful Elf ch.1 and Deeper relaxation for you so you should be able to continue. Here's a link to that save:
https://fileport.io/hMfHH1V1Sqxu
Let me know if that works for you and I greatly appreciate your patience and understanding with this!