[2021] I just bought the game on Steam and various items like trees and volcanoes are pink. Can someone help me fix it please?

Did you have previously a hacked, corrupted or pirated version before purchasing on Steam?

Delete the %AppData%\..\LocalLow\mkarpenko\WorldBox folder ( it will delete your saved worlds as well, so you can back them up first ) and try again

Please update the game to the latest Steam version