made a small update, please let me know if there are still issues.
@CertainDeath you could also try out the control building level-up mod from https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=410535198 (it hasn't been updated in a while, but for me it works)

can you make a lvl 3 version? lvl 1 dissapears so fast.

I finally found out that Building Themes has a built in editor, so I'm unsubscribing to all of them and creating my own, as I go.

@Radltruhe where can i find that output_log? is it from the mod? because that report i have found already.
@Angelhearth ...It still doesn't solve the district-style problem, apparently I can't edit these without automatically creating a new one I'd then have to republish... district style management is severely messed up and there's not much I can do about it, but I still feel very sorry about that! I can understand that the error-messages are annoying, but perhaps that's in some cases the price to pay T-T

That's great news! I always identify these problems by myself using output_log.txt.
Inside check for "unknown prefab" errors to identifiy which assets have this problem.

Loading Screen Mod. An absolute must.

working on removing the assets from the collection. With the interface-as-it-is the district style will be most difficult to edit. Does the mod you mentioned show you exactly which assets are concerned?

I will see what I can do. I hope my game loads correctly at all... This will be quite a pain in the a** ;)

You guys are obviously using props made by Xave (or whatever his name is). I will strongly advice AGAINST that, the guy obviously removes props, which screws up the assets in that they don't look like you intended and that it gives error messages.

Here's a list of 3 props you have used in several of your assets.

520835388.XAVE PROP White Flower Bush_Data
520836031.XAVE PROP Red Flower Rd Bush_Data
520836338.XAVE PROP Purple Flower Rd Bush_Data

I like your assets, but I dislike these error messages even more, because they tell me that the asset maker trusts un-trustable prop makers and don't really care about an asset they made, after they have uploaded it. And having close to 5000 assets it will be a hell of an error report if asset makers doesn't clean up their assets.

Please fix:
Unknown prefab: 520836338.XAVE PROP Purple Flower Rd Bush_Data [Serialization]

asset got updated, please see the changelog in the description. Thanks for your patience!

4x3, L1