[2020] Buildings disappearing after placement

Check the options for Ploppable RICO Revisited to make sure it's set right. By default it doesn't have the options for non-RICO growables enabled, which you will need to enable to be able to place any growables. :)

Make sure the options for both Ploppable RICO Revisited and Plop the Growables are the same if you have both running. If not then they will not behave well together.

And make sure you DO NOT have Disable Zone Check at the same time. It breaks the other two mods' so buildings will despawn.

Can you post your output_log.txt (called player.log on Mac and Linux)? That would let us see all your installed mods and any errors that might explain, why it isn't working for you.

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