Is there a solution to this Unity WebGL build problem?

When doing a WebGL build of a Unity game I'm getting the following errors:

IOException: Access to the path '\?\C:\Users\clint\Unity\Haunted Zombie Rush\Library\BuildPlayerData\Editor' is denied.

Error building player because script class layout might be incompatible between the editor and the player.

I granted 'Everyone' full control of the folder that is saying access denied.

This project uses Unity 2023.1.19f1. I'm running Windows 11.


  • @BugFinder! Deleting the contents of the library folder and rebooting Unity fixed the problem.