What is simulation failed: endeserialize (citizen manager) tag

[Eruesso]

I tried to open the game, but when loading this message appears and half of the screen turns blue and the game crashes
What is the problem? It's a mod and what would it be?

[CyberVibes]

First off all verify your game files then go into LSM options and tick Try to Recover from Simulation Errors. I it works save the game under a new unique name and try to create a new save everytime you do a chunk of work by pressing F1 that way you'll have plenty of fallbacks if other issues arise in the future.

To verify the files Click Library then right click on Cities Skylines in the left hand pane, select Properties then choose Local Files and click the Verify integrity of game files.
https://help.steampowered.com/en/faqs/view/0C48-FCBD-DA71-93EB

[Eruesso]

Sry for my ignorance, but what is or where are that LSM options?
So there is a problem with my save, then a need to recover, right!?

[snowflitzer]

till the game update this month you need to use this mod:
https://steamcommunity.com/sharedfiles/filedetails/?id=2731207699

Go into your settings of the game and there you can change the options for this mod

[MarkJohnson]

Originally posted by Eruesso:

Sry for my ignorance, but what is or where are that LSM options?
So there is a problem with my save, then a need to recover, right!?

Sometimes the problem is missing content, so try going to content manager, savegames, find your current saved game, then click subscribe all, then enable all, and then try to launch it again with all workshop intact. Don't forget to say a couple of prayer.

If this fails, then it may be a corrupt saved game file, usually caused my too much workshop and running out of memory. Or possibly, a a "exit to desktop" type mod, that exited the game while it was saving the game and corrupted the saved game file.