I have been playing sims 4 for at least 6 years now and this bug ALWAYS happens, you play for hours on a good computer/laptop which loads everything perfectly but then out of nowhere you click "Explore worlds" or "travel" or switch to any other screen, the loading screen appears and it never goes away!!! You can leave the game for hours, that thing is NEVER gonna load and yes, you lost ALL YOUR PROGRESS!!!! It has been years! Years! And this bug has never been fixed, they are probably gonna tell me "you can save the game more often to avoid losing so much progress", no, no one wants to do that, and in case you're wondering, no, I haven't got any mods, I have the game and one expansion pack. HOURS of progress completely lost!! I've been playing since sims 1, I am a massive fan of the game but it is unacceptable that the same bug keeps coming back again and again after years invested in the game. I have also played in many different computers and this had happened in every single one of them.
Edit By crinrict: Adjusted Title to better reflect the issue