In pre-decorated apartment can't use toilet

Product: The Sims 4
Platform:PC
Which language are you playing the game in? Svenska
How often does the bug occur? Every time (100%)
What is your current game version number? 1.59.73.1020
What expansions, game packs, and stuff packs do you have installed? Apartment Living, Pets, Pets addon, Christmas, Luxury, maybe more.
Steps: How can we find the bug ourselves? Move your sim in to the apartment, already decorated, ask it to go to the loo.
What happens when the bug occurs? The sim says they can't reach the loo.
What do you expect to see? The sim to use the toilet.
Have you installed any customization with the game, e.g. Custom Content or Mods? Never used.
Did this issue appear after a specific patch or change you made to your system? Neutral/Not Sure 

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I did not edit this apartment, except for putting up a poster from the trash (in another room though).

My sim says something is in the way so they can't use the toilet. Luckily they were going to work and could go potty there. But home again, and the bladder fills, problem remains! This apartment and decoration is fully Maxis design. So the fault is not in how I built it or decorated.

I've played this game lots before but I just reinstalled it (new computer) and this is my first household.