Part of the end day routine is crashing.In this case the rand_range function has been left empty. This has been fixed in most recent version. If you have a text editor (notepad, notepad++, or the like) you can fix it yourself. In the Strive folder, go to files\scripts\Mansion.gd. Open this file in your text editor and find line 823. This line should read:
person.lust -= rand_range()
Inside the parends type 30,40
This should fix your issue.