CO_Avanya

If you haven't already please check your mods against the list of broken mods, both the first tab and especially the tab named P&P DLC Patch. That error is likely from a mod that isn't updated for the current version of the game.
https://pdxint.at/BrokenModCS

Is this also the case if you add the launch options -noWorkshop and -disableMods and start a new city as a test?

How To Set Launch Options

• Right-click on the game title under the Library in Steam and select Properties.
  
• Enter the launch options you wish to apply in the box (be sure to separate each code with a space). Should look like this:
  -noWorkshop -disableMods
• Close the game's Properties window and launch the game.

We are aware of this issue and looking into a failsafe in case Steam Cloud is full

Make sure to unsubscribe, not just disable the old 81 tiles. And make sure to enable the new one.

Also, I recommend checking all your mods against the list of broken mods, both the first tab and especially the tab named P&P DLC Patch.
https://pdxint.at/BrokenModCS

Originally posted by ᕕ( ᐛ )ᕗ:

Originally posted by CO_Avanya: Is this happening with or without mods in use? And on default or workshop maps?

With mods, but no major conflicts and no conflicts pertaining to intercity bus that I can see in compatibility report... Workshop map, but one that YUMBL used and intercity buses worked fine for him.

I'm not able to recreate it without mods and have seen reports of this from before the patch too, so I suspect it might be a mod.... Read more

If you use mods please check your mods against the list of broken mods, both the first tab and especially the tab named P&P DLC Patch.
https://pdxint.at/BrokenModCS

If that doesn't help or you don't use mods, please make a thread on our support forum. We need to see your output_log.txt (called player.log on Mac and Linux) to be able to help, which cannot be attached here on Steam.
https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/

Windows
\SteamApps\common\Cities_Skylines\Cities_Data\output_log.txt
\CitiesSkylines\Cities_Data\output_log.txt

Mac OS X
Users//Library/Logs/Unity/Player.log

Linux
~/.c...

Read more

Is this happening with or without mods in use? And on default or workshop maps?

If a map doesn't have any plane connections, I'm afraid you won't see any planes from outside connections. You might be able to set up two airports and have planes travel between them if that is a faster route than other transport options, but that would be it.

If you use Building Variations that mod is currently broken and causes buildings to become invisible. I also recommend you check your mods against the list of broken mods, both the first tab and especially the tab named P&P DLC Patch.
https://pdxint.at/BrokenModCS

If that doesn't help or you don't use mods, please make a thread on our support forum. We need to see your output_log.txt (called player.log on Mac and Linux) to be able to help, which cannot be attached here on Steam.
https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/

Windows
\SteamApps\common\Cities_Skylines\Cities_Data\output_log.txt
\CitiesSkylines\Cities_Da...

Read more

Can you start a new city fine if you add the launch options -noWorkshop and -disableMods?

How To Set Launch Options

• Right-click on the game title under the Library in Steam and select Properties.
  
• Enter the launch options you wish to apply in the box (be sure to separate each code with a space). Should look like this:
  -noWorkshop -disableMods
• Close the game's Properties window and launch the game.

We are aware of this and currently investing the issue. Please let me know if you encounter other missing strings.

Originally posted by tolgus: I have the same problem. Verifying game files and reinstalling is not fixing it.

Please see my reply above yours, and if that doesn't help, let me know. :)

If you don't see the Paradox launcher please try a clean install of it using these steps:
https://steamcommunity.com/app/255710/discussions/0/1742265315844206043/

If that... Read more

This is how props and trees work, they can't be placed on top of roads. If you used to do that, then you likely used one of the Prop Anarchy mods. Check your mods against the list of broken mods, both the first tab and especially the tab named P&P DLC Patch, to see which ones are broken and get links to replacements.

https://pdxint.at/BrokenModCS

If you haven't already I recommend checking your mods against the list of broken mods, both the first tab and especially the tab named P&P DLC Patch.
https://pdxint.at/BrokenModCS

If that doesn't help or you don't use mods, please make a thread on our support forum. We need to see your output_log.txt (called player.log on Mac and Linux) to be able to help, which cannot be attached here on Steam.
https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/

Windows
\SteamApps\common\Cities_Skylines\Cities_Data\output_log.txt
\CitiesSkylines\Cities_Data\output_log.txt

Mac OS X
Users//Library/Logs/Unity/Player.log

...

Read more

Just to let you all know: We're currently investigating this issue

Originally posted by Josel: I have the same issue

Please report your issue on the support forum here:
https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/

This thread is over a year old and we've had two major patches since then. Even if the issue is similar, the cause and solution might be entirely different.

Originally posted by arunci: I'm still having the same problem. WTW buildings spawn, then disappear. Any suggestions would be appreciated

Does this also happen if you disable Building Themes? Just as a test, make sure to not save or overwrite your save as disabling the mod will affect all the parts of the city using the mod to control what spawns. The test is just to determine if the mod is causing the despawning of WTW buildings.

Did you get your save to load again?

Originally posted by Arthie: This is happening to me too. I reported on the Forum and Discord. Hope we have a hotfix or something soon.

Could you link me to the report on the forum? I can't seem to find it or might have overlooked it as related to the Epic issue.