I could back out in fact but every time I tried to re-open the e-mail it looked exactly like this. I tried continuing from previous autosaves at least 5 times and even reset the game twice to start from the very beginning but... the e-mail keeps looking exactly like that every time.
Thanks so much for the tip! I actually sent an e-mail to them via the form on their Simulacra website yesterday. If I don't get a reply from them, imma use the contact form you sent me! thanks for the help anyways! Imma keep you posted whether or not they fixed this.
EDIT: Actually, I just checked my mail and got a response from them super quickly! "Hi, Thank you for reaching out to us with the bug. We are fixing it and will be pushing out a patch soon. Hope you can enjoy the rest of the game soon!" So I guess it's gonna be fixed in the next couple of days