To easily find the folder mentioned in the error, right click your game in the Steam library, select Properties, go to the Local Files tab and select Browse local files.
You can upload it somewhere and link to it, then I'll have a look. Or you can make a post on the official support forums here: https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/
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:
... Read more
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
You can upload it somewhere and link to it, then I'll have a look. Or you can make a post on the official support forums here: https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/
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:
... Read more