game loading is in process

Product: The Sims 4
Platform:PC
Which language are you playing the game in? English
How often does the bug occur? Often (50% - 99%)
What is your current game version number? 4
What expansions, game packs, and stuff packs do you have installed? I have installed a few custom content files from Curseforge and I have the island pack and the pack with cats and dogs.
Steps: How can we find the bug ourselves? When you download cc from curseforge the sims4 game keeps saying 'The game is loading' on top of the screen and you are not allowed to save the game or build.
What happens when the bug occurs? I can't build or save my game and I also can't do multiple other stuff.
What do you expect to see? I see that my game doesn't work the way it should be.
Have you installed any customization with the game, e.g. Custom Content or Mods? Yes
Did this issue appear after a specific patch or change you made to your system? No

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