Having too many residents seems to trigger the end of day bug where no message will pop up and energy is not restored.
Attached save file. Click end day to see that it is working properly. Move the centaur from jail to communal and now the end of day will break. Not sure exact cause. Edit: This was due to the centaur being of grade "Person".
Also in that save file, cannot access gear for some of the last few characters. Try to access gear for "Lorelei" or "Centorea" and the UI won't pop up. I'm guessing it has to do with the "change order" and how it interacts with characters in the jail. Centorea was moved way up in the order but went to jail due to the end of day bug. In a later save I moved her to the bottom and it seemed to fix it. It could also be related to her being "person" grade.
0.5.8
https://www.dropbox.com/s/b7emb6ehzmv48wx/monstermusume3?dl=0