[MWS] Blank/Blue Wedding Event Planning Screen (Patch 1.103.315)

Product: The Sims 4
Platform:PC
Which language are you playing the game in? English
How often does the bug occur? Every time (100%)
What is your current game version number? 1.96.397.1020
What expansions, game packs, and stuff packs do you have installed? All of them.
Steps: How can we find the bug ourselves? Have both HSY and MWS installed and enabled. Have your sim get a SO and make it official. Wait for the SO to propose via the HSY relationship progression. Try planning a MWS Wedding Event, via any available method.
What happens when the bug occurs? The Wedding Event planning UI is blank other than titles, with a blue square where the image would be. I can only exit without being able to plan anything.
What do you expect to see? The list of events on the left, the picture for top listed event top right and the description of that event below it, with a button to proceed at the bottom. To be able to select an event and continue planning.
Have you installed any customization with the game, e.g. Custom Content or Mods? Not now. I've removed them.
Did this issue appear after a specific patch or change you made to your system? Neutral/Not Sure 

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I haven't had a wedding in a while (I play premades a lot, who are often married already), so haven't seen this issue until playing with a single premade who's fiancé proposed to her. He actually proposed twice, because he proposed, died (via NS, he was a townie) and then his ghost proposed a second time.

I've tried planning the wedding event (Engagement Dinner) 4 ways: phone, calendar, computer and via the action on the fiancé. None worked.

I also tested on a different engaged couple (Markovics, premade engaged couple), and they could plan an event via any method just fine.

Edit By Crinrict: Fixed tags