[2020] Persistent Array index is out of range. [System.IndexOutOfRangeException] without anydetails

Definitely make sure you don't have any other versions of TMPE subscribed. If not, then we will likely need to see the output_log.txt (called player.log on Mac and Linux) to see what's triggering the error.

Here's where to find the log depending on your operating system. To easily find the local files for the game, right click your game in the Steam library, select Properties, go to the Local Files tab and select Browse local files.

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

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

Linux
~/.config/unity3d/Colossal Order/Cities: Skylines/Player.log

As we can't attach files here on Steam, you will need to upload the file somewhere else. Here's a few sites you can upload it to, which do not require you to sign up first:

https://uploadfiles.io/ - free, no sign-up, can handle large log files
https://paste.ee/ - fast, no sign-up required (some log files will be too large for it though)
https://zerobin.net/ - bit clunky, but can handle huge files, no sign-up required

Hmm, that log is from version 1.6.3-f1 and we're on 1.13.1-f1 :S

It should delete the log every time you start the game and then make a new one. Not sure why it wouldn't do that. Try verifying game files through Steam and then delete the log manually. Then start the game and try to load your save.

Here's how to verify game files: https://support.steampowered.com/kb_article.php?ref=2037-QEUH-3335

There we go, fresh log from the current version. ^^

Looks like you have an animal somewhere on the map that's glitched out. Should be easy enough to fix with the Loading Screen Mod. Before loading your city, go to Options, find the Loading Screen Mod on the list on the left, then find the Safe Mode options. Enable all 3 and try loading your save.

I had a look at your mods too and found some old ones you should unsubscribe and replace with newer versions:

- Customize It! - use Customize It Extended instead
- Transport Line Rendering Fix - no longer needed and actually hides your metro lines
- Demand Master - dynamic demand is broken, I'd look for an up to date demand mod that fits your needs instead
- More Beautification - has a bunch of minor issues and lowers fps. I recommend just using Find It instead
- Network Skins - get Network Skins 2 instead
- Auto Line Color - broken, get AutoLineColor Redux instead
- Terraform Tool - old and not needed since you have the newer Extra Landscaping Tools
- Ploppable RICO - get Ploppable RICO Revisited instead
- Extended Public Transport UI - long dead, broken and was implimented into the game

If the Loading Screen Mod's Safe Mode options doesn't work, upload another log from an attempt with them and without the above mods.

Is that log from after unsubscribing the above mods and with the Safe Mode options from the Loading Screen enabled? I still see the old mods listed. The log should refresh itself each time the game starts, but just delete it in case it isn't being overwritten correctly. Then try loading again with the Safe Mode options all enabled, and upload the new log that will be created from that attempt. Sorry for the inconvenience!

Subscribe to the Save Or Saves mod, enable it and restart the game. Then make sure the Safe Mode options from the Loading Screen Mod are also enabled before trying to load your save.

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

Try disabling all mods except these (you can leave any of the default ones on, like Unlock All or Unlimited Money if you use them):

- Any Road Outside Connections
- Less Steam
- Improved Content Manager
- More Train Tracks
- Unlimited Outside Connections
- Extra Train Station Tracks
- 81 tiles
- Loading Screen Mod
- Network Extensions 2

If it loads fine, things will likely be chaos. Just ignore that and DO NOT save over your existing save. This is just to test if it will load correctly with the bare minimum of mods. If it works, then it's a matter of finding the troublesome mod.

If it doesn't help, then try sharing your save here and we can give it a go. To do so, go to the Content Manager, find Savegames on the left, then find your save. Click Share, add a name and description if you'd like, and click the Upload button. Then copy the link of the page here.