I tried downloading the game but when I click "start campaign" it doesn't work. (I'm on windows)
Can you post a link to your log file here? Pastebin works well for this.
C:\Users\username\AppData\LocalLow\Free Lives\Second Earth\Player.log
https://pastebin.com/d2FpzVau
Aha. It seems like you were running the game from a network address?
I might be able to fix this bug. But in the mean time I'd suggest copying the files to your local machine and running it from there.
Okay, I will try that. Thanks.