This error means the park file you're trying to load is invalid. Does it only happen with a specific save or every park? My inkling is that your save may have become broken somehow , have you tried navigating to your save directory and moving all the files to a different location and loading the game?
Problem loading OpenRCT
in Problems, Bugs and Feedback
Posted · Edited by AventurineSun
This error means the park file you're trying to load is invalid. Does it only happen with a specific save or every park? My inkling is that your save may have become broken somehow , have you tried navigating to your save directory and moving all the files to a different location and loading the game?