This error may occur when World of Warcraft is prevented from making changes to a game file. It can be caused by incorrect permissions, a security program, or an error in the file itself. Follow the steps below to resolve the issue.
- Run the game in Administrator Mode to address many installation, patching, networking, and start-up errors.
- Disable or temporarily uninstall any security programs, which may mistakenly identify the login module as a security threat.
- Update your drivers to resolve any compatibility issues.
- Run the Battle.net repair tool to repair any damaged game files.
- If the problem persists, uninstall and reinstall the game.