[2020] How can I get Biffa plays indie games to fix my city?

From the description of his videos fixing games:

➤If you want me to FIX YOUR CITY use this form:
https://forms.gle/N4D5u4jgqBQr5UZH7

Originally posted by martha_hku: The loading screen mod told me " simulation: failed"

Have you changed anything since it worked last time? Like removed any mods the city might depend on? Does it also not work after restarting the game?

If not, then try the Loading Screen Mod's Safe Mode options to attempt to recover from a simulation error. More on how that works here:
https://steamcommunity.com/workshop/filedetails/discussion/833779378/1635291505029642401/

You can also add the mod Save Our Saves, which does something similar, but fixes different issues. I recommend doing both at the same time as they work well together. Just remember to read the description and turn it off again if the save loads fine.

https://steamcommunity.com/sharedfiles/filedetails/?id=529129546

If it works again, make sure to save as a new file. Generally you should always do this (I add a number at the end so I have CityName1, CityName2, CityName 3 and so on), as it leaves you with backups of your city in case something goes wrong somewhere.

If the mods above don't work, then post your output log (player.log on Mac and Linux) after trying to load the save. This guide explains where to find it and recommends some sites to upload it to, since we can't attach files here on Steam.
https://steamcommunity.com/sharedfiles/filedetails/?id=463645931&searchtext=log