CO_Avanya

Best suggestion I have at this point then is add Save Our Saves and SafeNets. Enable both mods, restart the game, then enable all the Safe Mode options from the Loading Screen mod and try loading your save (have 81 tiles enabled at this point too, so that missing doesn't break things).

https://steamcommunity.com/sharedfiles/filedetails/?id=529129546
https://steamcommunity.com/sharedfiles/filedetails/?id=1620588636

We aren't able to provide support here on Steam discussions, but if you make a post on our official support forums, we'll be able to investigate this.

https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/

The error mentions TreeUnlimiter, I'm guessing that's Unlimited Trees mod, so try unsubscribing the mod for now (unsubscribe, not just disable).

Traffic Manager: President Edition is one mod that can turn off despawning and cause this.

When saving it make sure to check the "Publish" box so it shows up as an option when starting scenarios. After doing that it will be in the Scenarios category in the Content Manager, which is where you can share it to the workshop.

With both mods the additional tiles become available when you unlock the last milestone.

There's one difference between the 25 tiles mods and the 81 tiles mod that is worth noting. The 25 tiles are generated by the game without mods, you just only get to pick 9 of them to use. That means that they are all functional. The outer tiles that 81 tiles unlocks don't exist in the basegame - the mod creates them.

This means that a save using 81 tiles is depending on that mod and if the mod breaks, you might not be able to load your city again. While the 25 tiles mods can be disabled safely and your city will still function.

AquilaSol's guide has a pretty good rule of thumb to use.

How many assets can I install on [xx]GB RAM?
It depends on the size of the assets. The game runs on the Unity engine, which loads all assets directly into the RAM on game load. so a 60MB train station uses 60MB RAM. A 10KB prop only uses 10KB, and so you can subscribe to a lot more before reaching the limit.

The average rule of thumb for the base game is:
4GB: 0-10 assets
8GB: 100-400 assets
12GB: 400-800 assets
16GB: 800-1200 assets
24GB: 1200-2000 assets
32GB: 2000-2800 assets
64GB: 2800-6000 assets
If you have any of the major DLC's or content creator packs, reduce the asset count by another 400 each. Each DLC adds about 250-400 assets to the game.

If it crashes on the loading screen, you've got too many. Remove them or buy more RAM.

A large pagefile can let you go beyond that, but be prepared for it to aff... Read more

A crash is when the game unexpectedly shuts down.

For the missing mods, I suggest unsubscribing both, let Steam remove the files, then subscribe to them again. This lets Steam redownload all the files, which fixes any issues with the mod files being corrupted. Also check to make sure you don't have any mods which are incompatible with these.

Unlimited Trees and Tree Snapping are incompatible. Remove one and the trees stop flying.

That sounds like maybe a simulation error. Before loading your save, open Options and find the Loading Screen Mod on the list on the left. Then find its Safe Mode options and enable them all. Then try loading your save. If it works, save as a new file.

If that doesn't work, I recommend you post on the official support forums. It's a lot easier to look into things there, since you can attach your output log and savegame to a post.

https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/

Mass Transit isn't needed to select vehicles. If you're missing this option to change bus types, then you most likely have a mod that's causing it to not show up. In that case add the launch option -disableMods and test on a city that doesn't use mods.

https://steamcommunity.com/sharedfiles/filedetails/?id=2469338560

Ah, so they show up in the Content Manager and are enabled, but they are not available in game for you as bus options?

For retexturing this guide should help you get started:
https://steamcommunity.com/sharedfiles/filedetails/?id=737423817&searchtext=retexture

The assets show up in my content manager just as they should, so at least it doesn't seem to be an issue with them. Let's see if there's a mod messing with things for you. Add the launch option -disableMods to Steam (right-click on the game, select Properties and add it in the box at the bottom of the window). Then start the game and see if they show up as they should.

Could you also check the Steam Workshop section of the content manager? With Steam connection issues they may show up there, while not in the Asset category, so checking both places will help us figure out where the issue is.

Did you contact Steam Support or Paradox Support?

Either way I would also recommend making a post on our official support forum, and attaching the files from the crash there, so we can have a look at what's happening.

https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/

The assets are likely missing a network or mod to function. If you use the Loading Screen Mod that should be able to give you a link to what is specifically missing.

Alternately you can check the workshop page of the broken assets to make sure you have everything that's required. The number you see is the SteamID, which you can add to this url to find the items on Steam: https://steamcommunity.com/sharedfiles/filedetails/?id=

For example, the first three are this item: ... Read more

If you're in the Steam app you can right-click on a page and select the option "Copy Page Url"

Best place to get the help you need is our official support forums, where you can attach logs, so we can see what's happening.

https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/

Unfortunately, Steam discussions isn't equipped to provide support, so I will need to you make a thread on our official support forums: https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/

Describe what happens in as much detail as you can and attach both the error.log and the output_log.txt to the post. Then we'll be able to investigate what's causing the crash and help you get back in the game.